PDF malware analysis — malicious · aaa84ba92627b5c6

MALICIOUS

PDF

328.2 KB Created: 2011-04-13 09:14:10 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))

MD5: 2b64c427ba8d93eb42941dfd984f5668 SHA-1: 6df90c1b1881b010e1373b68f811ec6beb7c03d8 SHA-256: aaa84ba92627b5c649a647e69c3e36401db2494c8614fd9064380e08cc339abc

78 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains embedded JavaScript and triggers a critical heuristic for the CVE-2008-2551 DownloaderActiveX exploit. This exploit is designed to download and execute a secondary payload from a remote URL. The embedded URL http://artisanballoonz.com/system/system.exe is highly suspicious and likely hosts the next stage of the attack. The PDF optional content group with an action trigger further supports the 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_001_off00000418.bin` `80ce46be3b4d5733393d911e720cc341eac961413bc8841086c1643fee9fc14b`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x418	73272 bytes

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