PDF malware analysis — malicious · 74078052226b5363

MALICIOUS

PDF

4.5 KB Created: 2008-31-20 53:85:00 Authoring application: 1631 (via 1631 2.5)

MD5: 7f1b8bda01aca1a0278d0340887b6f37 SHA-1: b8a97237b210162d6ba12b72371121bd019e4383 SHA-256: 74078052226b5363bb3cfcb69d34dbff69e0f1b5dd094d683ee1c4e44f0ffe07

188 Risk Score

Machine Learning

Nyx PDF Classifier malicious score 0.9999

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)
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (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.
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_obj0013_001.js` `da83f06dc9cc0d6d3c465c406d05429b4c80fc84a061ac2275c917cc89260561`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3D4	70042 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).

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