PDF malware analysis — malicious · fbf01ea3fdd75128

MALICIOUS

PDF

2.5 KB

MD5: 32e4a4e1912bde8d6a27aeb60d34e1bc SHA-1: 9789173b3e9bce04ea52439c8ffb45cba1614f60 SHA-256: fbf01ea3fdd75128c44b11ec7f1df6e80c7c937c531b65b51e792e4a9dafa390

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript, flagged by multiple heuristics including PDF_JAVASCRIPT and PDF_JS. The ML classifier strongly indicates maliciousness. A high-confidence heuristic, PDF_EVAL, points to the use of eval() within the script, which is often used to deobfuscate and execute malicious code. The presence of obfuscated JavaScript suggests the script's purpose is to download and execute a secondary payload. No specific family could be identified.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

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_obj0009_000.js` `72a53138a280f8a0db468596307f63b6b927c9f16db4afcf6ed3d67bce6e2f07`	pdf-javascript-stream	PDF /JS object 9 at offset 0xD6	34194 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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