PDF malware analysis — malicious · 7e10a576d77b3562

MALICIOUS

PDF

4.1 KB

MD5: eea9229fa9ae58a2226b87a407e3bf42 SHA-1: 28d7baf8909f668a70117b824c25ec9f59a5f3b2 SHA-256: 7e10a576d77b3562b321b71fc64e71f1330e69a5f5a18654cce4920cb75c11f4

96 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 PDF_EVAL and PDF_FROMCHARCODE firings suggests the script is obfuscated and uses eval() to execute code. The ML classifier strongly flags this PDF as malicious. The embedded JavaScript files, 'acroform_b64_00.js' and 'javascript_obj0013_001.js', are the primary artifacts, likely containing the malicious payload execution logic.

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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0013_001.js` `125ef14fabab3fb5bec0fa9a9e4b974a2ea6c18f26abf09cbc41421a515401fd`	pdf-javascript-stream	PDF /JS object 13 at offset 0x368	6445 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`acroform_b64_00.js` `810222b384c8138f20bf4c62e89cb06ab9d219d6fe65e6c7284e39b000944522`	deobfuscated-js	PDF AcroForm base64 (decompressed) at offset 0x99D	3681 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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