C6 Messenger Downloader — PDF malware analysis

Static analysis result for SHA-256 5ec05a848f0de54e…

MALICIOUS

PDF

146.9 KB Created: 2011-06-22 16:28:40 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))
MD5: 526e55db700ac6ef9262d7d3c1a7ad70 SHA-1: b06c68c32d4659d8f38232059361b0c6011b5fb4 SHA-256: 5ec05a848f0de54e5fbd074644c3bfb1fdffa82f7b1679ea97c27125aee925be
92 Risk Score

Malware Insights

C6 Messenger Downloader · confidence 95%

MITRE ATT&CK
T1203 Exploitation for Client Execution

The sample is a PDF file that contains a critical heuristic firing for CVE-2008-2551, indicating it exploits a vulnerability to download a payload. The embedded URL 'http://artisanballoonz.com/system/system.exe' is highly suspicious and likely the second-stage payload. The other embedded URL is confirmed benign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7081

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_off00000dc2.bin
80ce46be3b4d5733393d911e720cc341eac961413bc8841086c1643fee9fc14b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xDC2 73272 bytes

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