PDF malware analysis — malicious · 56b8a2fbffd4784d

MALICIOUS

PDF

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

MD5: b68ec8f9054362f9cf499b842d1363a1 SHA-1: 46e8cead7d8958b1b67860c15e5d9c115b34b36b SHA-256: 56b8a2fbffd4784d60c24551db64b24c8238f581f23a45bd467eabe86965634a

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript

The file is identified as malicious by ClamAV with the signature Win.Trojan.Agent-36166. Static analysis revealed embedded JavaScript, indicating an attempt to exploit PDF vulnerabilities. The JavaScript stream is large, suggesting it may download and execute a second-stage payload. The document body is unreadable, so the specific lure cannot be determined.

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` `46ff04ca179bf13778d07f1e48b55730f2714c1fb786b32b1d36424139dfa13a`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	73929 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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