C6 Messenger Downloader PDF malware analysis — malicious · 033cd5d4f6f035c1

MALICIOUS

PDF

284.4 KB Created: 2011-06-22 18:24:25 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))

MD5: 7fc7ad5ac90d9a386b616a5cc6904189 SHA-1: aa1cad6d762f86ffd40c619a58e27745210c20ff SHA-256: 033cd5d4f6f035c1df718c5c8b39b5a2a78f2e15d8197b3b4fc5d31e74c774bd

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 known exploit for CVE-2008-2551, identified by the 'C6 Messenger DownloaderActiveX exploit' heuristic. This exploit is designed to download and execute a payload from a remote URL. The embedded URL 'http://artisanballoonz.com/system/system.exe' is highly suspicious and likely serves as the download location for the malicious executable.

Machine Learning

Nyx PDF Classifier malicious score 0.9470

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.

Filename	Kind	Source	Size
`stream_001_off000003d4.bin` `80ce46be3b4d5733393d911e720cc341eac961413bc8841086c1643fee9fc14b`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x3D4	73272 bytes

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