PDF malware analysis — malicious · 90b87fee942f6c0c

MALICIOUS

PDF

4.9 KB

MD5: 1ac6146351d943db7da58e09c534a5e7 SHA-1: ff3daa3245e18888a56b64790e749627bcc5fb21 SHA-256: 90b87fee942f6c0cc861bc6eddf59a7ade70a77b9a122587069cea9092db463f

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.002 Malicious JavaScript

The PDF contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The ML classifier strongly suggests maliciousness. The presence of U3D content and related CVE indicators points to an exploit targeting Adobe Reader's 3D parsing capabilities. The embedded JavaScript streams, javascript_obj0005_000.js and javascript_obj0010_001.js, are the likely vectors for payload delivery or execution.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

Heuristics 6

U3D/3D content in PDF — Adobe Reader 3D parser CVE-family indicator high CVE related PDF_U3D_CVE_RELATED

PDF contains U3D (Universal 3D) or 3D annotation content — CVE-2011-2462 and CVE-2009-3953 are critical vulnerabilities in Adobe Reader's U3D processing that allow arbitrary code execution. U3D content in PDFs is extremely rare in normal documents.
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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0005_000.js` `8fcadc4830602a0c494675b1b76543f7711b51bb6995687e841dc8e5b1028e44`	pdf-javascript-stream	PDF /JS object 5 at offset 0x10D	12750 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`javascript_obj0010_001.js` `c0cd2ee3533b9d679f28bb0eced3371e489af5ddea1a07aa831274800a3b77fd`	pdf-javascript-stream	PDF /JS object 10 at offset 0xFA8	650 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`u3d_00_off000011a4.bin` `e00529de8eb67ea2d15d40cde55e4ee2838b591c072672ff56bbde360266575c`	pdf-3d-stream	PDF U3D 3D stream at offset 0x11A4	304 bytes

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