C6 Messenger Downloader PDF malware analysis — malicious · 5ec808706b5a6ef5

MALICIOUS

PDF

49.4 KB Created: 2011-07-07 22:21:06 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))

MD5: 25602ab63619d37439c60bc882e6559f SHA-1: 411638b986f5914390355d3b4cc91d6f62bff06c SHA-256: 5ec808706b5a6ef557af63872a8eb70e9c5cd3f406c482c700b16ff28e7e3a19

62 Risk Score

Malware Insights

C6 Messenger Downloader · confidence 90%

MITRE ATT&CK

T1203 Exploitation for Client Execution

The PDF file contains a marker for the C6 Messenger DownloaderActiveX exploit (CVE-2008-2551). 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 payload.

Machine Learning

Nyx PDF Classifier suspicious score 0.2812

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_off00000701.bin` `80ce46be3b4d5733393d911e720cc341eac961413bc8841086c1643fee9fc14b`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x701	73272 bytes

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