Exploit:W32/PDF-URI.L

Classification

Summary

Exploit:W32/PDF-URI.L is detection of a malicious PDF file that is being heavily spammed through email and it appears as an attachment.

This malicious PDF file takes advantage of a vulnerability on the URI handling of PDF files. This vulnerability affects IE7, Adobe Acrobat, and Adobe Reader on some platforms.

Users should update their Adobe Reader installations. See the details section for information.

Removal

Based on the settings of your F-Secure security product, it will either move the file to the quarantine where it cannot spread or cause harm, or remove it.

A False Positive is when a file is incorrectly detected as harmful, usually because its code or behavior resembles known harmful programs. A False Positive will usually be fixed in a subsequent database update without any action needed on your part. If you wish, you may also:

Check for the latest database updates
First check if your F-Secure security program is using the latest updates, then try scanning the file again.
Submit a sample
After checking, if you still believe the file is incorrectly detected, you can submit a sample of it for re-analysis.
Note: If the file was moved to quarantine, you need to collect the file from quarantine before you can submit it.
Exclude a file from further scanning
If you are certain that the file is safe and want to continue using it, you can exclude it from further scanning by the F-Secure security product.
Note: You need administrative rights to change the settings.

Technical Details

Actions

This malware disables the Windows Firewall by issuing the following command:

netsh firewall set opmode mode=DISABLE

Then it downloads the a file from the following FTP site and executes it:

ftp://81.95.146.181/[REMOVED].exeDetected as Trojan-Downloader.Win32.Small.glc

The vulnerability reference is: CVE-2007-5020.

Microsoft's Advisory

Platforms

Windows XP or Windows 2003 (Vista users are not affected) with Internet Explorer 7 installed.

Affected Software Versions

Adobe Reader 8.1 and earlier, Adobe Reader 7.0.9 and earlier. Adobe Acrobat Professional, 3D and Standard 8.1 and earlier versions, Adobe Acrobat Professional, Standard, 3D and Elements 7.0.9 and earlier.