PDF malware analysis — malicious · 22a67342a9573cf0

MALICIOUS

PDF

45.0 KB

MD5: e1460783185132a3c115177007e79810 SHA-1: a3615edc415d57c453cb187294b54260108cb12b SHA-256: 22a67342a9573cf08918731b1e6d7af18a45c47468ac5329cb4a1232c42867ca

106 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF was flagged by ClamAV as Pdf.Exploit.Agent-36128 and a machine learning classifier indicated a high probability of maliciousness. Embedded JavaScript streams were detected, suggesting the PDF is designed to exploit a vulnerability and execute malicious code. The exact nature of the exploit and payload is not fully discernible from the provided information, but the presence of JavaScript actions and streams points to a common PDF exploitation technique.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 3

ClamAV: Pdf.Exploit.Agent-36128 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36128
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0008_000.js` `1f187d3d41c370cfa92ee8c69a9d228b878ce479098a835d5774ea3aa0c93b94`	pdf-javascript-stream	PDF /JS object 8 at offset 0x1E7	45305 bytes
`legacy_pdfkit_stage_000.js` `2d95d5ea52378404ac0247ada6a7651687dbccfb1db0b6b505bbd8273a37679a`	deobfuscated-js	double percent-decoded annotation JavaScript at offset 0x1E7	33047 bytes

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