PDF malware analysis — malicious · 83727defff45d8db

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: 859a12d064d55474f020f61f5de14a03 SHA-1: c13d45235a20bd5ff44b097641d820729725808b SHA-256: 83727defff45d8dbf84319a93c4d4c1210923d7753534ed0635775a054bcb172

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript

The PDF file contains embedded JavaScript, indicated by heuristic firings for PDF_JAVASCRIPT and PDF_JS. ClamAV detections (Win.Trojan.Agent-36166) confirm the malicious nature of the file. The JavaScript is likely used to download and execute a second-stage payload, a common technique for malware delivery.

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` `86f3a0c554bcbce0b793587f1a09484b696e96017b70b61d062e42224e294765`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	75148 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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