PDF malware analysis — malicious · ad9c96153b4a3c91

MALICIOUS

PDF

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

MD5: 451f400ffabe88b70862af187931fd50 SHA-1: b36ccbab34ebc99008e201f7274b14ca21a9f2f0 SHA-256: ad9c96153b4a3c91582caf4a934468790d8e4015e555ee85ef473223e8f5bf79

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The file is identified as a malicious PDF by ClamAV (Pdf.Exploit.Agent-35541). Static analysis detected JavaScript actions, embedded JS streams, and an eval() call, indicating the execution of obfuscated JavaScript. This JavaScript is likely responsible for exploiting a PDF vulnerability to achieve arbitrary code execution, as suggested by the PDF_LAUNCH heuristic.

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` `38b0c544d79ad6f96aad8b23ef67570ae528a27d636b048a36e61914f8a842e7`	pdf-javascript-stream	PDF /JS object 27 at offset 0x21C1	6749 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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