PDF malware analysis — malicious · e71757da7842618b

MALICIOUS

PDF

629.8 KB Created: 2011-05-26 13:18:33 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))

MD5: 8cd2f12bb343663a62eb24e03bafcb67 SHA-1: b4c1b43cbcfac9250436c6e8f27c9aba8e55eb1d SHA-256: e71757da7842618b2e38dbdf39bc5b6ad894e31cf2a82c9f154093ab8a9cfe1c

76 Risk Score

Malware Insights

MITRE ATT&CK

T1204.001 Malicious Link/Object

The PDF contains embedded JavaScript and a critical heuristic firing for CVE-2008-2551, indicating an exploit for the C6 Messenger DownloaderActiveX. This exploit likely facilitates the download of a secondary payload from the unknown-reputation URL http://artisanballoonz.com/system/system.exe. The presence of an optional content group with an action trigger further suggests malicious intent.

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_002_off000006af.bin` `80ce46be3b4d5733393d911e720cc341eac961413bc8841086c1643fee9fc14b`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x6AF	73272 bytes

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