PDF malware analysis — malicious · 938585b5831518d2

MALICIOUS

PDF

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

MD5: 1031d880980a6a2b727be600ea20b085 SHA-1: 7f4827c923bbdce22838b7f17f3cda52943c3d98 SHA-256: 938585b5831518d2a907ddd568cac53e45c0bf8aaef2bc8c87f98b2ea8f7c9be

208 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

This PDF file was flagged as malicious by a ClamAV signature (Pdf.Exploit.Agent-35587) and an ML classifier. It contains embedded JavaScript, which is obfuscated and uses an eval() call. The script likely downloads and executes a second-stage payload, as indicated by the heuristic firings for PDF JavaScript and eval() usage. The extracted artifact name 'javascript_obj0013_001.js' is included as an IOC.

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` `38c35d7826098b50e31d11b5464b7f12fdb339997a34198262a70e0d35e89b4c`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3DA	5961 bytes
Detection ClamAV: Pdf.Exploit.Agent-35587 Obfuscation or payload: likely Carved artifact contains 6 eval/decoder/string-building token(s).

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