Malicious PDF — malware analysis report

Static analysis result for SHA-256 64b9d11e94964953…

MALICIOUS

PDF

689.5 KB Created: 2011-05-26 13:01:45 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))
MD5: a67f6953f0bf50c99791b23ae71cc6ea SHA-1: 8800c131b7db0ee01c77c480539a51b62484b1ad SHA-256: 64b9d11e9496495395dc6e9615e0c75c8bc321996fbad1261488a8a84a94753f
92 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The PDF contains a marker indicating exploitation of CVE-2008-2551, a known vulnerability for client execution. It also embeds a URL that points to a Windows executable, suggesting the file's purpose is to download and run a secondary payload. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9463

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_off00000416.bin
80ce46be3b4d5733393d911e720cc341eac961413bc8841086c1643fee9fc14b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x416 73272 bytes

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