PDF malware analysis — malicious · 94153bb73f1e8c3c

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: bfd3d4788f8595e8bc39d08d31a92282 SHA-1: 03b9d0667bb7332cf1ad4346f8bede4bb82fd8d5 SHA-256: 94153bb73f1e8c3c5a7712421cb785dc0dd316950806e4757a8287cd10b397e9

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. ClamAV detections confirm this is a malicious file, specifically identified as Win.Trojan.Agent-36166. The embedded JavaScript is likely responsible for the malicious payload delivery, although its specific actions are not detailed in the provided evidence. The file's structure and the ClamAV signature suggest it's a downloader or dropper for a known Trojan.

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` `631866b886adeb708e5c008f19bd42e74c756160c564545c1d4f2b05ddebd647`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	75188 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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