C6 Messenger Downloader PDF malware analysis — malicious · 6cd6a7df906828df

MALICIOUS

PDF

310.4 KB Created: 2011-04-27 03:32:36 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))

MD5: cc71807c4a440a2493a00c3b233be451 SHA-1: 2f20dac92e397a1dc8e12b94aa6c8d0fbcd86971 SHA-256: 6cd6a7df906828dff9fe21147867699606f068fb01ba8cf179dd3644564042ca

92 Risk Score

Malware Insights

C6 Messenger Downloader · confidence 95%

MITRE ATT&CK

T1203 Exploitation for Client Execution

The sample was flagged by a critical heuristic for the CVE-2008-2551 exploit, which is known to download and execute payloads. The embedded URL points to a CAB file which likely contains an ActiveX control, and another URL points to a system.exe executable, strongly suggesting a downloader functionality. The ML classifier also provided a high confidence score for maliciousness.

Machine Learning

Nyx PDF Classifier malicious score 0.9577

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_off0000040f.bin` `80ce46be3b4d5733393d911e720cc341eac961413bc8841086c1643fee9fc14b`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x40F	73272 bytes

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