PDF malware analysis — malicious · 6b75030d975ff529

MALICIOUS

PDF

14.6 KB Created: 2009-11-15 19:41:70 Authoring application: PDF Library 4.3.9 (via PDF Library 3.9.7)

MD5: 19beae33fb58097dc08f8be312dd298c SHA-1: c75ca2d3714c4fd7683a5d11714d9294efca89f8 SHA-256: 6b75030d975ff529511120d1438bd25b07c209ae6e19c7932c80945430c4418f

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript, identified by multiple heuristics and ClamAV detection as malicious (Win.Trojan.Agent-36166). The JavaScript is heavily obfuscated but appears to be designed to download and execute a secondary payload, a common technique for initial compromise via malicious documents. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 4

ClamAV: Win.Trojan.Agent-36166 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Win.Trojan.Agent-36166
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.
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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `fb3814e4c5c7d74b5c87286a5579f7b80031af5662e946d15a068cd34783c45f`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	75013 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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