PDF malware analysis — malicious · 4696a61e4936c70d

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: 08368e0ca842228b9832413ca3a19851 SHA-1: 652f145d0dbf3dc3688422f9d4b1b7ac4e32f9ac SHA-256: 4696a61e4936c70d51bc2af9f136f7dc64516b9e30c5e15c91595f8b615dad98

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) on both the main file and an extracted artifact confirm its malicious nature. The embedded JavaScript is the likely vector for the detected malware, suggesting it downloads and executes a second-stage 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` `a83d4f6971a736e912d5858e4b9b363e48a6e1dc97d24d5bdffaf1f4cc4bad15`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	75131 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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