PDF malware analysis — malicious · d1f9ac4fda689b48

MALICIOUS

PDF

328.2 KB Created: 2011-06-22 16:35:26 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))

MD5: d604d332408910e89fd1c08a60575fd5 SHA-1: 107025fb3126b5a7187358dc968a802e05bf51c0 SHA-256: d1f9ac4fda689b485d9840b9bbdc7d05faf0adf53c1ada7304fc48a344300a2c

76 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.001 PowerShell

The PDF contains a critical heuristic indicating an exploit for CVE-2008-2551 (C6 Messenger DownloaderActiveX). This exploit is designed to download and execute a secondary payload. The embedded URL http://artisanballoonz.com/system/system.exe is likely the target of this download. The presence of embedded JavaScript further supports the exploitation of vulnerabilities within the PDF reader.

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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