Malicious PDF — malware analysis report

Static analysis result for SHA-256 627dd7beccfa772a…

MALICIOUS

PDF

119.0 KB Created: 2011-06-22 16:29:37 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))
MD5: fa31c08228c4a065b3ffa330ec79296f SHA-1: 877c41eff32fcc763419b1937445fbefd2d7df49 SHA-256: 627dd7beccfa772aebf6ef10986d760e0387ee4e0654eebfebe3454a53eb9a0d
92 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The PDF contains a marker for the C6 Messenger DownloaderActiveX exploit (CVE-2008-2551), indicating it attempts to exploit a client-side vulnerability. The embedded URL 'http://artisanballoonz.com/system/system.exe' is likely the second-stage payload. While another URL was present, it was flagged as benign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6912

Heuristics 2

  • 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.
  • 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://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_off00000429.bin
80ce46be3b4d5733393d911e720cc341eac961413bc8841086c1643fee9fc14b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x429 73272 bytes

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