PDF malware analysis — malicious · 1b4b9e1952ee828b

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: 77aa69c7c694211b4a6c7081fa522487 SHA-1: 85f8c56a0488f25ace59f6dae3ea8ce866a21279 SHA-256: 1b4b9e1952ee828ba65db1c0851574d19a3b14dd9ee97c0dcea2176e17333b4f

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 execute code. The document body is unreadable, but the presence of JavaScript and the ClamAV detection strongly suggest this PDF is a dropper or downloader for further malicious activity.

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` `cfb0798f1c931ac1db3b2492e743d784a4d26f9a160788233da601214c64add7`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	75144 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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