PDF malware analysis — malicious · e48eb350531a2b99

MALICIOUS

PDF

2.7 KB

MD5: 96fdf7c256f2f657614038f6f31593ad SHA-1: 0b62f57a88cc434fcccca7519f963801515506aa SHA-256: e48eb350531a2b99085f434d20b4e37164aed1116a3e13c27caea5c0dffd46e8

156 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The presence of an eval() call and String.fromCharCode usage within the JavaScript streams suggests obfuscated code execution. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to download and execute a secondary payload. The extracted JavaScript files are the primary indicators of this malicious behavior.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 6

ClamAV: Pdf.Dropper.Agent-1508617 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-1508617
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj111611_000.js` `443f4c41b38e8ba237072d28225e73ad48bef5a05beeca37d6378939c1a6ac2f`	pdf-javascript-stream	PDF /JS object 111611 at offset 0x197	258 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj111612_001.js` `49c5a86b773e9dec0e13cf9d2e166c97be14ea38a29fef529172cecb09261f62`	pdf-javascript-stream	PDF /JS object 111612 at offset 0x268	3286 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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