PDF malware analysis — malicious · a8128a768e1ff9b6

MALICIOUS

PDF

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

MD5: 177a70d9621465eab5c796100e198cce SHA-1: fd7e8f05827016924802b2b360bc11e2c25b217e SHA-256: a8128a768e1ff9b68f2d488cf5e7d860b1227af507dc2a93ec727ff908cc4974

208 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

This PDF file was flagged as malicious by ClamAV and a machine learning classifier. It contains embedded JavaScript with multiple eval() calls, indicating obfuscation. The script is designed to download and execute a second-stage payload. The presence of JavaScript actions and embedded JS streams, combined with the ML and ClamAV detections, strongly suggests a malicious exploit attempt.

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` `7078d3721647cd0074700cd0a8a6295c9cb82c79016b45631366de83626f1fde`	pdf-javascript-stream	PDF /JS object 13 at offset 0x389	5957 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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