C6 Messenger DownloaderActiveX PDF malware analysis — malicious · 6d40bb092ac5d6fc

MALICIOUS

PDF

212.7 KB Created: 2011-05-28 20:07:01 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))

MD5: a4cad609965110a9cb4c2699ecee008e SHA-1: 67928bd73ff2804062a100ada0c13fc9e618d739 SHA-256: 6d40bb092ac5d6fc6bb9cbe21071b2ff9ec14ea4a71eccc8d481eb0cb4c6a303

92 Risk Score

Malware Insights

C6 Messenger DownloaderActiveX · confidence 95%

MITRE ATT&CK

T1203 Exploitation for Client Execution

The sample is identified as malicious due to a critical heuristic firing for the CVE-2008-2551 exploit, which targets ActiveX controls. This exploit is designed to download and execute a secondary payload, indicated by the presence of an unknown URL pointing to a .exe file. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

Nyx PDF Classifier malicious score 0.8893

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_off000003e7.bin` `80ce46be3b4d5733393d911e720cc341eac961413bc8841086c1643fee9fc14b`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x3E7	73272 bytes

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