PDF malware analysis — malicious · affcbeaeb2ddfee8

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: 781749bd4d6c55b140d756192b5080ce SHA-1: c74de84b2eb964cfd84153cfbd867325275008c4 SHA-256: affcbeaeb2ddfee882b03dcc3deaf0e7182f8061127ce9413a1c12d55384ed57

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, which is a common technique for delivering malicious payloads. ClamAV detections of 'Win.Trojan.Agent-36166' on both the main file and an extracted artifact strongly suggest a malicious intent. The JavaScript action and embedded JS stream heuristics further support the execution of malicious code. The primary attack pattern involves leveraging these embedded scripts to download and execute a secondary payload.

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` `0f541733bb07d999b42a1fd14546b1444b4a7b09fec4b2e5c1d8606c24142189`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	75177 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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