PDF malware analysis — malicious · cf78d0cd1d3216d8

MALICIOUS

PDF

9.2 KB

MD5: dcf32b53226855a666a07541402cefb8 SHA-1: 1e8d13ee74c8b4327729924ce9931be39431e37b SHA-256: cf78d0cd1d3216d83c2f52f51fab1de200b7ff24ccc433b7cc3bdd2195503822

108 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains embedded JavaScript, flagged by multiple heuristics as malicious and obfuscated. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript streams are the primary indicators of malicious activity, likely responsible for downloading and executing a second-stage payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 4

ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
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.
Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0006_000.js` `62bf3bf786be38fcc7730f5312b93138fa7e29a9554755c441f16f8b19fcb0aa`	pdf-javascript-stream	PDF /JS object 6 at offset 0x1C0	4096 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0006_001.js` `d4ec2747a3f49c9ae39f6e68dd52403dd052843b61fecdd31a0975e5e2563cb6`	pdf-javascript-stream	PDF /JS object 6 at offset 0x1C0	8426 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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