SSReader Ultra Star Reader used to read PDG ebook. It can be download from
official site. It gain quite popular tool especially in Asia.
Some of popular servers in China were compromised to host this kind of exploit. One of the example is http://xxxxx9090.cn/bbb/xx.htm
When checking the content of the xx.htm file, seem it target for the Browser ActiveX BO
~object classid="clsid:
7F5E27CE-4A5C-11D3-9232-0000B48A05B2" id='target'>~/object>
~SCRIPT language="javascript">
window.onerror=function(){return true;}
Analysis:Tools:
- malzilla
1. Highlight the javascript and "
Send script to Decoder"

2. Change the '
eval' function to '
Document.write' function and press '
Run script' to deobfuscate the code


3. From here, the codes are in unicode. Have to decode again using '
Decode UCS2(%u)'

4. Once after decode the unicode, you may see it point to particular url to download file
hxxp://xia1686.cn/xia/a.exe
5. a.exe was collected and sent to
www.virustotal.com for analysis.
Based on Virustotal result, only 21/38 vendor detect the malicious file on 2-Jan-09
and 23/38 on 3-Jan-09