PDF malware analysis — malicious · aa92d0d2717a8691

MALICIOUS

PDF

10.7 KB Created: 2009-02-19 14:45:49 -02:00 Authoring application: Writer (via OpenOffice.org 3.0)

MD5: b14a1dbeaa796bb6a5d7ab480976179b SHA-1: df86d990f41314bbd9cf2c3d696dfb52f57ffe32 SHA-256: aa92d0d2717a86918b03d9a9e74967b45f8d890be3cd0bc153539a48fbc6faa8

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript with eval() calls and String.fromCharCode usage, indicating obfuscated code execution. ClamAV detected this as Pdf.Exploit.Agent-35541, suggesting a known exploit. The presence of JavaScript actions and embedded JS streams, along with a launch action, strongly suggests the PDF is designed to exploit a vulnerability and execute malicious code, likely a downloader for a second-stage payload.

Heuristics 7

ClamAV: Pdf.Exploit.Agent-35541 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35541
Launch action high PDF_LAUNCH

PDF contains a /Launch action with an unresolved or extension-less target — treat as potentially dangerous
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
JavaScript action low PDF_JAVASCRIPT

PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (matched inside decoded stream)
Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0027_000.js` `2d56c08ded3a0f196da921ac4c780f43a00e7fec448a29a68f15d45a370a04cd`	pdf-javascript-stream	PDF /JS object 27 at offset 0x21C1	6747 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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