PDF malware analysis — malicious · 74fed224c3a6f45c

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: 5956b2587ed54416dbd352e5cd6e1731 SHA-1: 0e3776c44bc2904ec5838e020647869a78fa2fd9 SHA-256: 74fed224c3a6f45c4dbced6638b9696d345382ba83a1d3b4e16eb22877c3c7a5

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by ML classifiers and ClamAV, which identified it as Win.Trojan.Agent-36166. Embedded JavaScript was detected, indicating the file's intent to download and execute a secondary payload. The obfuscated JavaScript, while not fully decipherable, strongly suggests malicious activity consistent with a trojan downloader.

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` `1d3a18b31b687234bcc65cdad55839cdd46ea0bb5f4e3b1f2427a1b34f7ca8af`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74968 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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