PDF malware analysis — malicious · 4c3bf8d6eb23b3a5

MALICIOUS

PDF

132.5 KB

MD5: fd3cdf90b5389de8c46d0ab7cbd850ee SHA-1: 92542ab02b79398124c227346dd55d74c6dbaee0 SHA-256: 4c3bf8d6eb23b3a52298022d471bd4cd30de83aebb177ffc79f362636e7644ca

166 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: Malicious JavaScript

This PDF file was flagged as malicious by multiple engines, including a high-confidence ML classifier and ClamAV. It contains embedded JavaScript, which is a common technique for exploiting PDF vulnerabilities. The embedded JavaScript itself was also detected by ClamAV as a known exploit.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

ClamAV: Pdf.Exploit.Agent-36388 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36388
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` `0304804a13ae7e544f687b3eff9ada60bc12636234f326c15cac723348a68099`	pdf-javascript-stream	PDF /JS object 76 at offset 0x2C2	119321 bytes
Detection ClamAV: Js.Exploit.HTML-27 Obfuscation or payload: unlikely

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