PDF malware analysis — malicious · 8905faac1c6f3dd4

MALICIOUS

PDF

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

MD5: 5f7334e27ae7632c904b41cab450f550 SHA-1: cd10210c6d630d8ef42c24413aca1a7af1a6bb70 SHA-256: 8905faac1c6f3dd4c0a80a18685d4d4dc1d3c35e5b6956c1c9a22a013a03cefe

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript that is obfuscated and uses eval() calls, indicating an attempt to execute malicious code. The 'PDF_LAUNCH' and 'PDF_EVAL' heuristics, along with the ClamAV detection 'Pdf.Exploit.Agent-35541', strongly suggest this is an exploit attempting to leverage a PDF vulnerability. The script's purpose is to download and execute a second-stage payload, though the exact URL is not directly extractable due to obfuscation.

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` `2d3d9cc2fbc0a69f1944be738a25b9ad641d3daa4d04dca61f5207705d99f5c1`	pdf-javascript-stream	PDF /JS object 27 at offset 0x21C1	6741 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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