PDF malware analysis — malicious · 4715602380158bc0

MALICIOUS

PDF

5.1 KB

MD5: fd3fa35734093bb2f6d032b6a564885e SHA-1: 68e4f68c94a7466b217264f32e14f6f6dc4f60dc SHA-256: 4715602380158bc03367e07d83b6c9afbee45deb2555a7265eba448eae7ef36b

96 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The PDF_EVAL and PDF_FROMCHARCODE firings suggest that the JavaScript is obfuscated and uses eval() and String.fromCharCode() to execute its code. The ML classifier strongly flags this PDF as malicious. The embedded JavaScript file, 'javascript_obj697241_000.js', is the primary artifact, and its presence along with the eval() call strongly suggests it's designed to download and execute a secondary payload.

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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj697241_000.js` `24407fe0cf7be284340867f56e9e96a4571cbf5db366ca0fbc84a1e27c8f2dfb`	pdf-javascript-stream	PDF /JS object 697241 at offset 0x135	8347 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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