PDF malware analysis — malicious · 4e684c2c67cf37a7

MALICIOUS

PDF

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

MD5: 94944b802b1bf7650a8bf31cce2efa68 SHA-1: 321e7991bd2dadfe561aa160c8cc54db4ca1bad9 SHA-256: 4e684c2c67cf37a70d1dc5da769b1a0cab3fa89a1e1190a4ef77bf72b8741019

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' heuristic firings. ClamAV detection confirms this file is malicious, specifically identified as 'Win.Trojan.Agent-36166'. The embedded JavaScript is the primary mechanism for exploitation, likely to download and execute a second-stage payload. The document body is heavily obfuscated and unreadable, providing no further context on the lure.

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` `23036b5ea216bd47bf473e164cc256b8617a1b8ae9ab22d60fa0c67aae69c373`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	75979 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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