PDF malware analysis — malicious · 720dfd07dcb868b6

MALICIOUS

PDF

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

MD5: 42dd74c94f861d235328a357e5799263 SHA-1: 7dccdb1e2058fd98a67215a96263998332e8412a SHA-256: 720dfd07dcb868b6cc00cfc44cf1a0695228b0732f4bb13a34318b5f10119277

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript, identified by multiple heuristics and ClamAV detection as Win.Trojan.Agent-36166. The JavaScript appears to be obfuscated but is designed to download and execute a secondary payload. This is a common technique for delivering malware via email attachments.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

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` `d2bbc4c00a20cb21c3ea653200c2dcc7b160b4c607fef0d83e385b631ed6d51c`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	75800 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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