C6 Messenger Downloader PDF malware analysis — malicious · 7b3cdd1ff89da0b2

MALICIOUS

PDF

284.2 KB Created: 2011-04-22 21:18:07 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))

MD5: 9c3aa981f47d4ae72adb10566d62641a SHA-1: 86a98086b8a74479cfeaa9648508f3e29147cc85 SHA-256: 7b3cdd1ff89da0b235f3b74dbe2227df746b7e40f70a24c69127834fe636ca0e

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 secondary payload from a remote URL. The embedded URL 'http://artisanballoonz.com/system/system.exe' is highly suspicious and likely hosts the next-stage malware. The ML classifier also flagged this PDF as malicious with high confidence.

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_off0000054a.bin` `80ce46be3b4d5733393d911e720cc341eac961413bc8841086c1643fee9fc14b`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x54A	73272 bytes

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