C6 Messenger Downloader PDF malware analysis — malicious · 036c0daa2ec1cb04

MALICIOUS

PDF

52.2 KB Created: 2011-04-27 03:00:07 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))

MD5: 0048f6613e114a29aacd8601382c7210 SHA-1: 0186a948f673a88c34c5a1a2c63db572a5684346 SHA-256: 036c0daa2ec1cb04c5d62db7da251b481b75fc03063b4151ff1bb2c0cf19e2b9

62 Risk Score

Malware Insights

C6 Messenger Downloader · confidence 90%

MITRE ATT&CK

T1203 Exploitation for Client Execution

The sample contains a heuristic firing for the C6 Messenger DownloaderActiveX exploit (CVE-2008-2551), indicating it attempts to leverage this vulnerability. It also contains an embedded URL that points to a potential executable payload, which is a common technique for downloading and executing second-stage malware. The exploit is designed to download and run a payload, likely leading to further compromise.

Machine Learning

Nyx PDF Classifier suspicious score 0.4005

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_off00001259.bin` `80ce46be3b4d5733393d911e720cc341eac961413bc8841086c1643fee9fc14b`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x1259	73272 bytes

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