PDF malware analysis — malicious · 4921b60a42c7fbac

MALICIOUS

PDF

14.6 KB Created: 2008-07-26 19:43:58 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: eb7bf1ea73d1c0a82e8d716c639202e7 SHA-1: b77b9883de9a40ea99a9e508b6d19b63f635ec86 SHA-256: 4921b60a42c7fbacec5cb0bd50dd17124a380601dbadba2b047c62503e6d0063

148 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF contains embedded JavaScript with multiple eval() calls, indicating obfuscation and dynamic code execution. Heuristics confirm PDF JavaScript actions and eval() usage, along with a high ML classifier score and ClamAV detection for 'Pdf.Exploit.Agent-36118'. The script's complexity and obfuscation suggest it's designed to download and execute a secondary payload, a common technique for initial access.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

ClamAV: Pdf.Exploit.Agent-36118 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36118
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
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.
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_obj0013_000.js` `3f6e0d339c8fb1b4e33221bebe91340ff018eea5a6fd54af4719bd4c4ebdfa55`	pdf-javascript-stream	PDF /JS object 13 at offset 0x336	13430 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 6 long base64-like blob(s).

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