Malicious PDF — malware analysis report

Static analysis result for SHA-256 27950a921c2488fc…

MALICIOUS

PDF

51.5 KB Created: 2011-06-22 18:29:34 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))
MD5: e8d9a9aabd63f1a0a833706ba2ed804f SHA-1: 876acff5a68b2a77385c745f76676b6cd121a0bd SHA-256: 27950a921c2488fc03e0f4e78748eb94c01bbe6a6bd8a90eca4d6018935c9e83
64 Risk Score

Malware Insights

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

The sample is a PDF document that exploits the CVE-2008-2551 vulnerability, indicated by the 'C6 Messenger DownloaderActiveX exploit' heuristic. This exploit is designed to download and execute a secondary payload from a remote URL. The embedded URL 'http://c6.community.alice.it/download/DownloaderActiveX.cab' and the heuristic firing suggest the use of an ActiveX control for downloading. The presence of an executable file at 'http://artisanballoonz.com/system/system.exe' further supports the payload download and execution scenario. The document body contains numerous benign URLs, likely for obfuscation or to appear legitimate.

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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