PDF malware analysis — malicious · 6f9e78af894482aa

MALICIOUS

PDF

2.5 KB

MD5: 1442733dc5bb1f834a9449f9eb90a6b1 SHA-1: 43d1ea7245fd8ab0eb32a3d5a503b3da9b4a63c4 SHA-256: 6f9e78af894482aa70db96ac3e47ed63c8cd82fe8962e0eb7855ab8579dd6bff

156 Risk Score

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 6

PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTER

PDF combines an executable JavaScript/action surface with exploit staging indicators such as eval/unescape/fromCharCode, XFA script content, or a related CVE pattern. Benign form JavaScript remains low-severity, but this correlated cluster is high-confidence malicious behavior.
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
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.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (matched inside decoded stream)
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_obj111711_000.js` `5c2c49b3d1a07679fc9da1590dde2f0b17a7bb88c80ed75bd73f761bd07104fe`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x197	2537 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`javascript_obj111712_001.js` `f7f7b4036fda2be3306f138bb716ccc40da8a6af4cc97b924deac7c33a724e81`	pdf-javascript-stream	PDF /JS object 111712 at offset 0x81F	506 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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