PDF malware analysis — malicious · 70305089a0643268

MALICIOUS

PDF

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

MD5: 2bbc7862353b6feb324b4da9631dfcb7 SHA-1: eef82976606a2a4efe77892f104e770245b57378 SHA-256: 70305089a0643268c7a3100388e06065dac306f916dabf35d62999f2ea3596a1

166 Risk Score

Malware Insights

MITRE ATT&CK

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, which identified it as Win.Trojan.Agent-36166. The sample contains embedded JavaScript, which is commonly used to exploit PDF reader vulnerabilities and download further malicious content. The obfuscated JavaScript, while not fully decipherable, strongly suggests an intent to execute arbitrary code.

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` `672584c97d939d5dbd4906356d6f51733d0081afadbbc478ed3c559f39c2860a`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74945 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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