PDF malware analysis — malicious · 9d9b78d0036e0b75

MALICIOUS

PDF

2.7 KB

MD5: deef0ce1e774e6e28b7fabae55f12748 SHA-1: a14491b453f6c2f4be172078066b8f8efde0afb7 SHA-256: 9d9b78d0036e0b75b8820d482dc810e477e9486a929bcef2f2ee319fcd8517b3

96 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains embedded JavaScript, with heuristics indicating the use of eval() and String.fromCharCode, suggesting obfuscated code execution. The ML classifier strongly flags this PDF as malicious. The embedded JavaScript files are likely responsible for downloading and executing a second-stage payload. Further analysis of the JavaScript content is required for a definitive family attribution.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

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_obj111611_000.js` `146d4712f55a0a574c451e3c216db0aecc0f806ff9e4a7913f0d21ab16b9470f`	pdf-javascript-stream	PDF /JS object 111611 at offset 0x197	258 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj111612_001.js` `1deca11849c2006a3415992682e33661b8e6c51392856fcd40d34bd96b22b5ed`	pdf-javascript-stream	PDF /JS object 111612 at offset 0x268	3353 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

Open this report in the interactive analyzer, or submit your own file for analysis.