PDF malware analysis — malicious · c6e9c4a99e53c655

MALICIOUS

PDF

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

MD5: b156469ffbab26521931625e427744db SHA-1: b313588465c6c94f0e6cbe55f905fb12c102fcad SHA-256: c6e9c4a99e53c655d5c0d15c7cfa90b7423c4f37465e23c1b48d2dfe94f966d7

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript

The PDF file triggered critical heuristics indicating it contains JavaScript and is detected by ClamAV as Win.Trojan.Agent-36166. The embedded JavaScript stream is likely responsible for the malicious behavior, potentially downloading and executing a second-stage payload. The document body was unreadable, but the presence of JavaScript and the ClamAV detection strongly suggest a malicious intent.

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` `60f7a5851b47223f97c0362ebb089516322784a7cc19d38188db2e8fcedf7b1d`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	75161 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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