PDF malware analysis — malicious · a74f7d96a299fcd6

MALICIOUS

PDF

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

MD5: 56e8fc1f598d6aa930fccc715920c2ba SHA-1: 0998bfc7ac556a9c6af63f9c915c49d5c12adf1e SHA-256: a74f7d96a299fcd627e28bae77b9cf29a6784425d0165256408b1d2a1381c865

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 heuristics. ClamAV detections (Win.Trojan.Agent-36166) confirm its malicious nature. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload, as suggested by the critical heuristic firings. The presence of JavaScript actions within the PDF structure points towards an attempt to exploit vulnerabilities or trick the user into executing malicious code.

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` `4128f3dcc338e708b0969508486e9dd8ae808903ea3746f1fbcdfee52a6cc6f8`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	83596 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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