PDF malware analysis — malicious · 9de3443f70225fb1

MALICIOUS

PDF

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

MD5: 9024ac44ab866c0a1d170a979dbc1d3e SHA-1: 079eca08346a6003c27323971666828a919c5817 SHA-256: 9de3443f70225fb150a39c9273ef3a144bf5f81dfe1b6f9e42bd074ef3ffb6d0

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The file is a PDF containing embedded JavaScript, as indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. ClamAV detections (Win.Trojan.Agent-36166) confirm its malicious nature. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload, a common technique for malware delivery. The document body is unreadable, so the rationale is based on the technical findings.

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` `658e5a480e4401e159a26f98406d82235433e378a7153fb7195cc0acb79da557`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	83776 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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