PDF malware analysis — malicious · 2b2275b8eaf54565

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: 5421d5e2b2298aa0beca6dbf1997e71d SHA-1: 8a6879d371dfed299828e5666ca30b1e3177e0e2 SHA-256: 2b2275b8eaf54565164fec6f4f979d8d9aa66dd6aa844a033211010b3f7b1654

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. The ClamAV detection of 'Win.Trojan.Agent-36166' strongly suggests malicious intent. The embedded JavaScript likely serves to download and execute a second-stage payload, contributing to the overall malicious nature of the file.

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` `2cbeb4a73f7eee9b93811d415072152ae7d4abe1890f84852b7a35900fcaca91`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74778 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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