PDF malware analysis — malicious · 9e6a40cf4d373930

MALICIOUS

PDF

358.5 KB Created: 2011-05-28 20:27:43 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))

MD5: 3734911335d0e31a403ebdf2cc0cca41 SHA-1: 1d2b79d0c2d83da1e1680855cf4c634ea211b4ed SHA-256: 9e6a40cf4d373930e6a2f3c5ce5d2da71f871529099417c9a1e4ae53c65bdf52

76 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File

The PDF file contains embedded JavaScript and a critical heuristic firing for the CVE-2008-2551 exploit, which is known to download and execute arbitrary files. The embedded URL 'http://artisanballoonz.com/system/system.exe' likely points to the secondary payload. The PDF's structure also indicates the presence of an optional content group with an action trigger, further supporting the exploit vector.

Heuristics 4

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 JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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_off000003af.bin` `80ce46be3b4d5733393d911e720cc341eac961413bc8841086c1643fee9fc14b`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x3AF	73272 bytes

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