PDF malware analysis — malicious · fda4cf277ac957e9

MALICIOUS

PDF

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

MD5: 102dde8a5e736f75f1e17a7bf8aeab4e SHA-1: 445bdf9ee9eeb040e2597bdd1ddf75c7e3d68083 SHA-256: fda4cf277ac957e9c03b0bfd55a367c000cb3229a8a13073616f7f516d82152f

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, indicating a known exploit. Static analysis revealed embedded JavaScript with eval() and String.fromCharCode calls, typical of obfuscated malicious code. The ML classifier also strongly indicated maliciousness. The primary function appears to be executing this script, which likely leads to the download and execution of a further stage.

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` `58821b932f52f9132eeae078c80ad66d9c949fef42364eb47c86a439c6a5c996`	pdf-javascript-stream	PDF /JS object 27 at offset 0x21C1	4513 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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