PDF malware analysis — malicious · f422e2fd1663289a

MALICIOUS

PDF

26.6 KB Created: 2006-02-01 14:14:12 Authoring application: Wegoptyr (via HghTc6Fs)

MD5: 1ec0bcb261b30ae732d06047b9d7f186 SHA-1: 9327e29d2278d11a7d34f976166b9984d0a4ebb8 SHA-256: f422e2fd1663289a9aaec0bb579fd78377fd103e2d2750270fa3d3478c7a22e7

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

This PDF contains obfuscated JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The ML classifier strongly flags this as malicious. The JavaScript uses eval() to execute dynamically generated code, a common technique for downloading and running second-stage payloads. The specific obfuscation makes it difficult to determine the exact payload or delivery URL without further dynamic analysis.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `7d59d63d37afa056abd42211e4d3de3ec0e5b33661e2cd0dfe4e6b5721644713`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1EE	26136 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`javascript_obj0007_001.js` `f6ae2210410d2402582e1a06e60cdef599d51700791903a067c74a4f9ff47ba6`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1EE	411 bytes

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