PDF malware analysis — malicious · 91fe9e9eb4ad7b73

MALICIOUS

PDF

1.95 MB Created: 2008-09-24 19:47:56 Authoring application: Adobe (via Notepad)

MD5: 16059140a1c73b40976843e277df4aa4 SHA-1: 21e935154ec4ccbc85fbb43e36bd492ca70847a7 SHA-256: 91fe9e9eb4ad7b734389cb8fd57b0298d3296ac8260fccc1b6ed27ff8e58141f

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

This PDF file was flagged as malicious by an ML classifier and contains embedded JavaScript. The JavaScript stream includes an eval() call, indicating it's designed to execute arbitrary code. This is a common technique for downloading and executing further malicious payloads. No specific family could be identified.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 4

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.
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` `dedc1a8949db369f6f80e92ba0c5404bfd5f90db7ce52ebd93e3f5828ce8ef7d`	pdf-javascript-stream	PDF /JS object 6 at offset 0x136D	144 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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