PDF malware analysis — malicious · 554eb73681c32895

MALICIOUS

PDF

792 B

MD5: f0422aceb58105683657b4e62fae91f6 SHA-1: a44c6fb8e214be8a16a567d2382a5ccdc1fc5ba9 SHA-256: 554eb73681c328951dd15922b5227ef43f4b73db5a8f53f8bb1fcc7c6bacffe0

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 Scripting: JavaScript

The PDF contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The ML classifier strongly suggests maliciousness. The JavaScript stream, named 'javascript_obj0006_000.js', is likely responsible for executing the malicious payload. The unescape() function call further supports the presence of obfuscated JavaScript, commonly used to hide malicious code execution.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 4

unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits
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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0006_000.js` `4f2a63efc56b08bbfe167f9a9f5006f34b77c2e9372ebbeb3fd3bfd9e5f471b5`	pdf-javascript-stream	PDF /JS object 6 at offset 0x167	176 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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