PDF malware analysis — malicious · 4a8691d7296c0f45

MALICIOUS

PDF

44.4 KB Authoring application: substr

MD5: b269e99b588af31864e81085d43974f6 SHA-1: 958f108036110d3ffa9fd37678481be33b98a83b SHA-256: 4a8691d7296c0f459d439a660919964fe525ad094aba670fb7ec046ddcf624d5

106 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: Malicious File

The PDF file was flagged as malicious by multiple engines, including a critical ClamAV detection and a high-confidence ML classifier. Heuristics indicate the presence of embedded JavaScript, suggesting an attempt to execute malicious code. The ML classifier's high score and the ClamAV detection strongly indicate this PDF is designed to deliver a payload or exploit a vulnerability.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 3

ClamAV: Pdf.Malware.Agent-7658965-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Malware.Agent-7658965-0
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_obj0001_000.js` `4ae196cecff3364ee12ea3243adc5914884552d2af4db00bfce564bfe1c91962`	pdf-javascript-stream	PDF /JS object 1 at offset 0xAF3A	419 bytes

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