PDF malware analysis — malicious · 42ba3177e0d98ec2

MALICIOUS

PDF

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

MD5: 71bb7ebea61ca5c46d420ee6e932e324 SHA-1: b446c4373893cd48281319c346db84c248c721b9 SHA-256: 42ba3177e0d98ec2df6b3474e412b5338e9c9a70f92a35730d79a80f5d7f0568

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' heuristic firings. ClamAV detections 'Win.Trojan.Agent-36166' on both the main file and an extracted artifact strongly suggest this JavaScript is used to download and execute a malicious payload. The specific nature of the payload is not detailed, but the overall pattern points to a malware delivery mechanism.

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` `1dc133c37493fece8acf8bcf760e948a201088bb735870fff85165f4daf4ae46`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74768 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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