PDF malware analysis — malicious · c31904598c22835c

MALICIOUS

PDF

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

MD5: 336db10cc27891d1c559d50902fa9f5e SHA-1: 87a34cfeabcdb7c26f935ed773ce89c39bb2a7dc SHA-256: c31904598c22835c2094a6a0a6c7d582f3f43327f720bdfc0da30e8f0c35998a

196 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

This PDF file was flagged by ClamAV as Pdf.Exploit.Agent-35541 and exhibits multiple high-severity heuristics indicating JavaScript execution and a launch action. The embedded JavaScript stream, identified as javascript_obj0027_000.js, likely contains obfuscated code designed to exploit a PDF vulnerability. The primary function appears to be downloading and executing a secondary payload, as suggested by the 'PDF_LAUNCH' and 'PDF_EVAL' firings.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

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` `f0de85de2f199708b04479a2f42552379a9d13673def96cad72ba906442488f3`	pdf-javascript-stream	PDF /JS object 27 at offset 0x21C1	6739 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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