PDF malware analysis — malicious · b28d5cfb50b76680

MALICIOUS

PDF

328.2 KB Created: 2011-04-22 21:35:42 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))

MD5: 43021652f32c9364a4c97284c7a74c76 SHA-1: 29e9b89e568cf0273b24a3c283a65668b7c13297 SHA-256: b28d5cfb50b7668003571422072ba7032b9a3522e18486c545251efb5d0e570d

76 Risk Score

Malware Insights

MITRE ATT&CK

T1204.001 Malicious Link: Malicious Link T1059.001 PowerShell

The PDF file contains an embedded JavaScript stream and a marker for the CVE-2008-2551 exploit, indicating an attempt to download and execute a payload. The heuristic firings strongly suggest exploitation of this known vulnerability. The extracted URL http://artisanballoonz.com/system/system.exe is likely the location of the second-stage payload.

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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