PDF malware analysis — malicious · b5baf8c3551fc388

MALICIOUS

PDF

6.3 KB Created: 2008-31-20 53:85:00 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: a4c6336dda91c82077834aa08484be0b SHA-1: 2e62f6ee59c743d247faaa40a2a18d4109c6a1c6 SHA-256: b5baf8c3551fc388ca7a650f60d6b0b5429009c4a5f9cf80c5f5b1ccfe8e54cc

208 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

This PDF file was flagged as malicious by ML classifiers and ClamAV with the signature Pdf.Exploit.Agent-35587. It contains embedded JavaScript with multiple eval() calls, indicating obfuscation. The script's intent is to download and execute a secondary payload, as suggested by the heuristic firings and the nature of the embedded JavaScript. The authoring application and creation date are likely spoofed to evade detection.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 6

ClamAV: Pdf.Exploit.Agent-35587 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35587
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
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_001.js` `2c79ea9c1aaa2a67cb9c35130ff18a5565da26f4dec50dc6caa6ebf66099f489`	pdf-javascript-stream	PDF /JS object 13 at offset 0x391	4947 bytes
Detection ClamAV: Pdf.Exploit.Agent-35587 Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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