Malicious PDF — malware analysis report

Static analysis result for SHA-256 618b70966acb8d12…

MALICIOUS

PDF

607.3 KB Created: 2011-05-17 09:15:43 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))
MD5: e60ed06462e65fcd838b449f8f778671 SHA-1: 21c28ee8e88aae3f5dfed176398eeb96d71ce03c SHA-256: 618b70966acb8d124daa687199c6ed2a5f9cce0dc0312424b7d510afeabf6373
92 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The PDF file contains a marker indicating an exploit for CVE-2008-2551, which is known to download and execute payloads. The embedded URL http://artisanballoonz.com/system/system.exe is highly suspicious and likely serves as the second-stage payload. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9714

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 In PDF document text
    • http://c6.community.alice.it/download/DownloaderActiveX.cab#Version=1,0,0,1In PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00000688.bin
80ce46be3b4d5733393d911e720cc341eac961413bc8841086c1643fee9fc14b
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x688 73272 bytes