PDF malware analysis — malicious · 05dd27289ef17e11

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: 8c5b4d83f8c7194c7cffd0b88552fc9c SHA-1: 229089751129bbcf39490cf084512311da4be7c2 SHA-256: 05dd27289ef17e11e3e3b6618ee74ddf1b9370b95fb8cdd69c43dcf0f7e35154

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 multiple heuristics and a machine learning classifier, with ClamAV identifying it as 'Win.Trojan.Agent-36166'. The embedded JavaScript, although heavily obfuscated, is indicative of an exploit designed to execute arbitrary code. The primary function appears to be downloading and executing a second-stage payload, a common tactic for malware delivery.

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` `251edadee0dea478687afd3a0739fca133ae31bbc3b2532db014bdadfea0b873`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74971 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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