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Security experts exploit Google Chrome Zero-day using malicious PDF



Security researchers have found a new malicious PDF  that could be easily exploited by the Google Chrome zero-day flaw when victims using Chrome as a local PDF viewer.

Attackers are exploiting the Chrome zero-day vulnerability to track the users and collect the personal information of the users when they open this malicious PDF in chrome browser.

The security experts at EdgeSpot were the first one to spot a flaw in PDF when it is opened via Chrome browser locally, but it has no malicious activities when it opened popular Adobe Reader.

The engine detected as  “POTENTIAL ZERO-DAY ATTACK (Google Chrome), PERSONAL INFORMATION LEAKAGE.

The researchers at Edgespot found that HTTP packet is collecting information of the user by the malicious sender:


  • The public IP address of the user.
  • OS, Chrome version etc (in HTTP POST header).
  • The full path of the PDF file on a user’s computer (in HTTP POST payload).


The users are suggested to use alternative PDF reader application for viewing the PDF until the Chrome issue is fixed, or you can switch off the internet while using Chrome to view PDF documents. 

CVE-2009-0927 : PDF Exploit targets Aviation Defense Industry

PDF exploits

Security Researcher have come across a Spam email that leads to a malware page which delivers the PDF exploit(CVE-2009-0927).    The campaign seems to be targeting the aviation defense Industry.

About CVE-2009-0927:
A stack-based buffer overflow vulnerability in the Adobe Reader and Adobe Acrobat before 9.1, 8 before 8.1.3 , and 7 before 7.1.1 allows remote attackers to execute arbitrary code via a crafted argument to the getIcon method of a Collab object "Collab.getIcon()".
If the recipient open the malicious PDF file, it opens a fake document and displays an invitation to an actual defense industry event. In the background, it exploits the PDF vulnerability.

If the victim's machine has the vulnerable version , then shellcode inside the pdf will start to execute.  The shellcode creates a file and run "evtmgr.exe in the Temp folder .

The exe file drops another dll file called mssrt726.dll which performs network communication and opens the backdoor at TCP port 49163.