C6 Messenger Downloader — PDF malware analysis

Static analysis result for SHA-256 64c5ce309cc340e4…

MALICIOUS

PDF

308.8 KB Created: 2011-05-28 19:45:51 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))
MD5: 7b8ff796195509f6c38c677b159f8f8d SHA-1: 733578bf149f9856b516e95c6fe8ded14b1b4bf7 SHA-256: 64c5ce309cc340e4dbb8503d67d701603d6dc66b35efafb35deec0f0b5ef9ace
92 Risk Score

Malware Insights

C6 Messenger Downloader · confidence 95%

MITRE ATT&CK
T1203 Exploitation for Client Execution

The PDF contains a critical heuristic firing for the C6 Messenger DownloaderActiveX exploit (CVE-2008-2551). This exploit is designed to download and execute a second-stage payload, indicated by the unknown reputation URL http://artisanballoonz.com/system/system.exe. The presence of the exploit and the download URL strongly suggest a malicious downloader functionality.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9561

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_off000003de.bin
80ce46be3b4d5733393d911e720cc341eac961413bc8841086c1643fee9fc14b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3DE 73272 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.