Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ad5ae092c1f65b6…

MALICIOUS

PDF

325.0 KB Created: 2011-05-28 19:43:03 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))
MD5: cbb450ae57074def853a1cfbc3ec7795 SHA-1: 876cfe345fe7d39577959b79ef23518e0de0a5b6 SHA-256: 0ad5ae092c1f65b63ad035f131378b689872e44bf86ccd4a6264975d38426893
92 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

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

Machine Learning

  • Nyx PDF Classifier malicious score 0.9621

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_off000003bc.bin
80ce46be3b4d5733393d911e720cc341eac961413bc8841086c1643fee9fc14b
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3BC 73272 bytes