PDF malware analysis — malicious · 83ad7e9c10cd5c0f

MALICIOUS

PDF

48.0 KB Authoring application: substr

MD5: b7e4df4995ca0718be865b34b9c91aa7 SHA-1: 91b936809be61e9f7d5fa3aa4d5a8522e05f6639 SHA-256: 83ad7e9c10cd5c0f6e1e615e04dba3727b28ba7407e881744c5400638260e5de

106 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF document contains embedded JavaScript which is obfuscated but appears to construct and execute a payload. The script reconstructs the string 'eval(s2)' and then calls it, indicating it's designed to download and run a second-stage payload. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 3

ClamAV: Pdf.Malware.Agent-7658978-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Malware.Agent-7658978-0
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` `9c5e5337f2a223ea3fd855badacac69233cbd465d2590c04026630c37de9859c`	pdf-javascript-stream	PDF /JS object 1 at offset 0xBD35	474 bytes

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