How to understand this javascript code consisting of numbers

Question

This is javascript code. I thought it was in hexadecimal form and tried to decrypt it, but still could not find the meaning of this code. I use this code in my blogger template. I want to understand the true meaning of this javascript code.

<script type='text/javascript'>
/*<![CDATA[*/
var _2507;
var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
var _7971=/[\x41\x42\x43\x44\x45\x46]/;
var _1205=2;
var _1838=_2789.charAt(_2789.length-1);
var _8636;
var _2596=_2789.split(_7971);
var _3552=[String.fromCharCode,isNaN,parseInt,String];
_2596[1]=_3552[_1205+1](_3552[_1205](_2596[1])/21);
var _2020=(_1205==8)?String:eval;_8636='';
_11=_3552[_1205](_2596[0])/_3552[_1205](_2596[1]);
for(_2507=3;_2507<_11;_2507++)_8636+=(_3552[_1205-2]((_3552[_1205](_2596[_2507])+_3552[_1205](_2596[2])+_3552[_1205](_2596[1]))/_3552[_1205](_2596[1])-_3552[_1205](_2596[2])+_3552[_1205](_2596[1])-1));
var _4599='_4241';
var _6610='_4599=_8636';
function _2139(_3635){_2020(_3054);_2139(_7565);_7565(_6610);_2139(_4599);}
var _3054='_2139=_2020';
var _7565='_7565=_2139';_2139(_1838);
/*]]>*/
  </script>

Answer 1

Your code has not been scrambled

document.write("
<link href='https://googledrive.com/host/0B-UFNCskEl7Qd25SMUNseFFPQkk' rel='stylesheet' ty
pe='text/css'/>");
$(document).ready(function (){
  $('#templateify').html('<a href="http://www.templateify.com">Templateify</a>');
  setInterval(function (){
    if (!$('#templateify:visible').length)window.location.href = 
    'http://www.templateify.com'
  }
  , 1000)
}
)$(document).ready(function (){
  $('#sponsorship').html(
  '<a href="http://www.templateify.com/p/sponsorship.html">Your Link Here</a>');
  setInterval(function (){
    if (!$('#sponsorship:visible').length)window.location.href = 
    'http://www.templateify.com'
  }
  , 1000)
}
)

http://wepawet.iseclab.org/view.php?hash=fac68b967bfb84d0d3e84ce0f6589015&type=js

I saved your code in an html file and uploaded it for analysis.

Answer 2

The main thing to note here is that _2020there is eval. The code in function _2139creates several aliases in eval:

_2020(_3054); => eval("_2139=_2020"); => _2139 = eval;
_2139(_7565); => eval("_7565=_2139"); => _7565 = eval;
_7565(_6610); => eval("_4599=_8636"); => _4599 =_8636;
_2139(_4599); => eval(_8636);

, _8636? ( ), , :

document.write("<link href='https://googledrive.com/host/0B-UFNCskEl7Qd25SMUNseFFPQkk' rel='stylesheet' type='text/css'/>");
$(document).ready(function () {
 $('#templateify').html('<a href="http://www.templateify.com">Templateify</a>');
 setInterval(function () {
     if (!$('#templateify:visible').length) window.location.href = 'http://www.templateify.com'
 }, 1000)
})
$(document).ready(function () {
 $('#sponsorship').html('<a href="http://www.templateify.com/p/sponsorship.html">Your Link Here</a>');
 setInterval(function () {
     if (!$('#sponsorship:visible').length) window.location.href = 'http://www.templateify.com'
 }, 1000)
})

https://googledrive.com/host/0B-UFNCskEl7Qd25SMUNseFFPQkk; , , . #templateify #sponsorship, , . , , ( http://www.templateify.com, http://www.templateify.com/p/sponsorship.html).

, templatify.com. .

, , - (, Chrome) :