PDF malware analysis — malicious · fb19622427191011

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: 1f06ac1dcd5044648818f3b557f36f2d SHA-1: ec6d477c22bae32f21cb005354b78f5f473920be SHA-256: fb19622427191011b10519b4d6ff3ad58f8468986a2b0aadbf5c951aca50194c

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file triggered critical heuristics indicating it is malicious, specifically ClamAV detections for 'Win.Trojan.Agent-36166'. The presence of embedded JavaScript, identified by 'PDF_JAVASCRIPT' and 'PDF_JS' heuristics, suggests an attempt to execute code. The document body content is unreadable, but the combination of PDF format and JavaScript strongly implies a malicious intent, likely to download and execute 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` `9cf39fb11500c3fb605da22cd501a946c1ab38c04345e368e47358fcf3383e04`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74832 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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