PDF malware analysis — malicious · a8eb5a61055cfa22

MALICIOUS

PDF

45.0 KB

MD5: d6ff3f7d6b66de3d6e3f96e4b0b3a95e SHA-1: c02be9c70cd391815006f0868b921a7b60e387cd SHA-256: a8eb5a61055cfa221ba565211efeb92642c810cee3e4922ea3f3d51e88991e51

106 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file was flagged as malicious by multiple heuristics, including a critical ClamAV detection for 'Pdf.Exploit.Agent-36128'. It contains embedded JavaScript, which is a common technique for exploiting PDF vulnerabilities. The ML classifier also strongly indicated maliciousness. The embedded JavaScript is likely responsible for executing the exploit.

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` `087055ac5609807317e7403fdbf26683465b956d58c265234ea008c7d79a4db8`	pdf-javascript-stream	PDF /JS object 8 at offset 0x1E7	45305 bytes
`legacy_pdfkit_stage_000.js` `773b0e89347d0a24aa66891d58df500277f0c80111fe1f1730692d3bffd8d326`	deobfuscated-js	double percent-decoded annotation JavaScript at offset 0x1E7	33047 bytes

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