Malicious PDF — malware analysis report

Static analysis result for SHA-256 e79bc661e14a7946…

MALICIOUS

PDF

51.5 KB Created: 2011-05-26 14:26:31 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))
MD5: 7f21e335f48b9edfdd3ea9855e98e102 SHA-1: 7671ba9c7867f66523eae4b011aa56fef7b81af7 SHA-256: e79bc661e14a7946288f4b3dc7fdeb66cbf4a9f396dffa21f1190b4c55ef59c0
62 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1059.001 PowerShell

The sample is a PDF file that contains a heuristic firing for the CVE-2008-2551 C6 Messenger DownloaderActiveX exploit. It also contains an embedded URL pointing to a CAB file which likely contains the exploit. The file also contains an external URI to http://artisanballoonz.com/system/system.exe, which is highly suspicious and likely the second-stage payload. The combination of an exploit and a download URL strongly suggests a downloader attack pattern.

Heuristics 3

  • C6 Messenger DownloaderActiveX exploit critical CVE exact CVE_2008_2551
    PDF stream bytes contain HTML/ActiveX content configuring the vulnerable C6 Messenger DownloaderActiveX control with propDownloadUrl and propPostDownloadAction=run. This is the published exploit shape for CVE-2008-2551.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://artisanballoonz.com/system/system.exe
    • http://www.irna.ir/View/FullStory/?NewsId=840728
    • http://www.farsnews.com/newstext.php?nn=8809221138
    • http://www.irna.ir/View/FullStory/?NewsId=839237
    • http://www.farsnews.com/newstext.php?nn=8809221807
    • http://c6.community.alice.it/download/DownloaderActiveX.cab#Version=1,0,0,1

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_001_off00000fe2.bin
80ce46be3b4d5733393d911e720cc341eac961413bc8841086c1643fee9fc14b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xFE2 73272 bytes

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