PDF malware analysis — malicious · 027c1842d8a2e4a6

MALICIOUS

PDF

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

MD5: 80b91608aab929df69670c77955a552d SHA-1: b8ec83d6a3828bc23e2a8883630ccb1d0257d1d6 SHA-256: 027c1842d8a2e4a620710d282410f7ba4483e7565b90adfa0ed141caa4e205cd

166 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file contains embedded JavaScript, which is a common technique for exploiting vulnerabilities and delivering malicious payloads. Heuristics and ClamAV detection confirm its malicious nature, identifying it as Win.Trojan.Agent-36166. The embedded JavaScript likely attempts to download and execute a second-stage payload, contributing to the overall malicious intent of the document.

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` `dafed36550e16c25a5ed96e40f299ea447bac33a84545037f9db240173f3efa1`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74349 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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