PDF malware analysis — malicious · b58b0387409b6e1f

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: 89532abd05d66c797840b539cfb6ae41 SHA-1: 032ee1564b0634db8f0b6d831a95c7f94d35c14d SHA-256: b58b0387409b6e1f2879f3fa0b27421c6086f6b2183888342bcb3bd4d4224724

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The file is a PDF containing embedded JavaScript, indicated by multiple heuristic firings. ClamAV detection confirms it as Win.Trojan.Agent-36166. The embedded JavaScript is likely responsible for executing malicious code, potentially exploiting a PDF vulnerability to achieve this. The document body is unreadable, but the presence of JavaScript and the ClamAV signature strongly suggest a malicious downloader or trojan.

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` `6332ab8354a7d61338bd7b17820c5a981e3a49f50ce5e3a3275387f25032d40e`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74354 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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