PDF malware analysis — malicious · c5efbd57a4873156

MALICIOUS

PDF

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

MD5: 24a3045c1c6f7b612f4d1410a7897324 SHA-1: 102964d8205a96fc97beb91d1b4b3afaba6aef89 SHA-256: c5efbd57a487315689bebc19ba31e8a9b4e814b2e4ade32004981f78278e1b46

90 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript, flagged by multiple heuristics including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The ML classifier strongly indicates maliciousness. The embedded JavaScript stream, named 'javascript_obj0006_000.js', likely contains obfuscated code designed to execute arbitrary commands, potentially downloading and running a secondary payload. The 'eval()' call is a strong indicator of dynamic code execution.

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_obj0006_000.js` `92b5e5859f275eaa20d5fda72c1d43f422aaf498d468d92b75f8c85937f3277e`	pdf-javascript-stream	PDF /JS object 6 at offset 0x1328	133 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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