PDF malware analysis — malicious · 766bf2a4b5e16506

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: faf015ab98d8ec2a8550a20a9545f22b SHA-1: 50131b20e78c2b349e832b688a23ac06ff6cd86e SHA-256: 766bf2a4b5e1650609ac02e1b2f774f998ddc66884116bb61d47393ed4147f60

166 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file was flagged as malicious by ML classifiers and ClamAV, with specific detections for 'Pdf.Exploit.Agent-15799' and an extracted artifact 'Win.Trojan.Agent-36166'. Embedded JavaScript was found, indicating an attempt to exploit vulnerabilities and likely download a secondary payload. The obfuscated JavaScript, while not fully decipherable, strongly suggests malicious intent consistent with exploit delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 4

ClamAV: Pdf.Exploit.Agent-15799 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-15799
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` `f3ebc953be14b6fad1c30f9460ce9b7cc4f77ad9ec01e85ea7eac66083fc51eb`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74778 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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