Malicious PDF — malware analysis report

Static analysis result for SHA-256 67aa087533082ce2…

MALICIOUS

PDF

1.16 MB Created: 2011-04-22 05:28:43 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))
MD5: 4424df954c1e51ae869cfb34f8f503ca SHA-1: feb00ddff6296fa8c9e73b3d0eb55b922e617cc0 SHA-256: 67aa087533082ce227581df02c2b85e2ef8162bdbbba6e4b5eb9c41786a2c2b8
92 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The PDF contains a critical heuristic firing for CVE-2008-2551, indicating an exploit for a known vulnerability. This exploit is designed to download and execute a secondary payload, identified by the URL http://artisanballoonz.com/system/system.exe. The ML classifier also flagged the PDF as malicious, supporting this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6496

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_003_off00000a8f.bin
80ce46be3b4d5733393d911e720cc341eac961413bc8841086c1643fee9fc14b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xA8F 73272 bytes

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