PDF malware analysis — malicious · a4b88281838f41f3

MALICIOUS

PDF

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

MD5: 42b7946ebe388203da72e30a737d8576 SHA-1: 19c176f737acfe802abcbb159dd0e799835fff97 SHA-256: a4b88281838f41f3ef64bb19c3be88056d6e5cf50367500b3a226c870761ab8e

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript, which is a common technique for delivering malicious payloads. ClamAV detections of 'Win.Trojan.Agent-36166' strongly suggest the presence of a known trojan. The JavaScript action and embedded JS stream heuristics confirm the use of scripting within the PDF. The extracted ClamAV detection name is the primary IOC.

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` `1a1c22241494fb169b4a2a8faaf9491d944404310678fcf22c0170eab04e4f02`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74372 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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