PDF malware analysis — malicious · 99afb52cd33d80ec

MALICIOUS

PDF

12.2 KB

MD5: 9a509e2b4d847a20778b0fa99745b7d3 SHA-1: 51b557bab854d79b405f69fa6ade46e106076e00 SHA-256: 99afb52cd33d80ecbf05f7cdf586be60d0af7fd6b2f34ddc6ff6136ee18a4267

166 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: Malicious File

The PDF file was flagged as malicious by multiple heuristics, including a high-confidence ML classifier and ClamAV detections for Pdf.Exploit.Agent-36365 and Pdf.Exploit.Agent-36364. The presence of embedded JavaScript streams indicates an attempt to execute malicious code, likely exploiting a PDF vulnerability to achieve this. The primary attack vector appears to be leveraging embedded scripts for exploitation.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

ClamAV: Pdf.Exploit.Agent-36365 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36365
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_obj0076_000.js` `2fe28c1b1ac4b4d283e150b8a3a2d7c9418ac50859792fdcd2a959affd96296b`	pdf-javascript-stream	PDF /JS object 76 at offset 0x369	11395 bytes
Detection ClamAV: Pdf.Exploit.Agent-36364 Obfuscation or payload: unlikely

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