PDF malware analysis — malicious · 725f8a5b3f2c48f6

MALICIOUS

PDF

296.8 KB Created: 2011-05-26 13:02:36 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))

MD5: a9812803ea34a29bdea9cfc1c4cb94c2 SHA-1: 208acaee0b493129763a9706773feda283ed327d SHA-256: 725f8a5b3f2c48f6a3ce2e0b446bf8d0e82afcd579d7525aa78c18763a2dc243

100 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution

The PDF contains a critical heuristic firing for CVE-2008-2551, indicating an exploit for a DownloaderActiveX component. The embedded URL 'http://artisanballoonz.com/system/system.exe' is highly suspicious and likely serves as the download location for a malicious executable. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

Nyx PDF Classifier malicious score 0.9166

Heuristics 3

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.
Optional Content Group with action trigger low PDF_OPTIONAL_CONTENT

Optional Content Group (layer) co-occurs with an action trigger — content can be selectively hidden from viewers or scanners while the action still fires on open
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_off000003f9.bin` `80ce46be3b4d5733393d911e720cc341eac961413bc8841086c1643fee9fc14b`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x3F9	73272 bytes

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