C6 Messenger Downloader PDF malware analysis — malicious · c491b638d5f6a473

MALICIOUS

PDF

797.8 KB Created: 2011-04-27 02:30:46 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))

MD5: 853ee4e5e1b80eea2f245bd9104e8cd5 SHA-1: 1a6af0333b8375a0e14d504fd022d520166da5e2 SHA-256: c491b638d5f6a4735b7c4926d22fc4958d154dbecb6d4eec15b9685e94c3168b

60 Risk Score

Malware Insights

C6 Messenger Downloader · confidence 90%

MITRE ATT&CK

T1204.001 Malicious Link/Object: User Execution: Malicious Link

The sample contains a critical heuristic indicating the CVE-2008-2551 exploit, which is associated with the C6 Messenger Downloader. 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 likely the source of this payload.

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_002_off0000095d.bin` `80ce46be3b4d5733393d911e720cc341eac961413bc8841086c1643fee9fc14b`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x95D	73272 bytes

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