PDF malware analysis — malicious · 4556c7f8b8f9f9c4

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: c81b0bddae9c713467c60d7b4530841f SHA-1: 1edb51f83b09fbf681880bb19f41693c8503b987 SHA-256: 4556c7f8b8f9f9c458a60957dd6c27fe4599acbf82d5d57b2f0235256858a7e0

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file was detected as malicious by ClamAV with the signature Win.Trojan.Agent-36166. Static analysis revealed embedded JavaScript, indicating an attempt to execute malicious code. The JavaScript likely functions as a downloader for a secondary payload, which is a common technique for malware delivery. The specific nature of the payload could not be determined due to the complexity or obfuscation of the script.

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` `b1ef1418245b3fccce463a020d2c620558b227ac33b853d2c052ec62ad6d315a`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74591 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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