PDF malware analysis — malicious · b1a11a46de17ef03

MALICIOUS

PDF

551.4 KB Created: 2011-05-26 13:30:03 Authoring application: Joomla! 1.5 - Open Source Content Management (via TCPDF 3.0.015 (http://www.tcpdf.org))

MD5: 9da9fca0ab182fc9ac57f10b86f0f76b SHA-1: f30e1a32b3d85749b88e6b667455b9d466999b65 SHA-256: b1a11a46de17ef03fe556678d673343266afe4ddc527ad3aefcf59fda890d3ca

76 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.001 PowerShell

The PDF sample contains embedded JavaScript and exploits the CVE-2008-2551 vulnerability, commonly used for downloading and executing arbitrary code. The heuristic firing for CVE_2008_2551 directly indicates this exploit. The embedded URL http://artisanballoonz.com/system/system.exe is likely the second-stage payload. The PDF's structure and exploit suggest a downloader functionality.

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_off00000b4a.bin` `80ce46be3b4d5733393d911e720cc341eac961413bc8841086c1643fee9fc14b`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0xB4A	73272 bytes

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