Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a14eb250ec3e173…

MALICIOUS

PDF

888.2 KB Created: 2011-05-17 09:21:12 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))
MD5: af52cc6e7b5daa05d3f0b208c4f4df2c SHA-1: 7edcf2b9930551ff7155e9612ba48a7666ba365e SHA-256: 0a14eb250ec3e173f74e34771342ab77e649565a8a06d1bd4e30af9b13dc02ff
92 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The PDF contains a marker for the CVE-2008-2551 exploit, which is known to download and execute arbitrary code. The embedded URL points to a potential second-stage executable, 'system.exe', on 'artisanballoonz.com'. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9396

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_002_off0000069c.bin
80ce46be3b4d5733393d911e720cc341eac961413bc8841086c1643fee9fc14b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x69C 73272 bytes

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