PDF malware analysis — malicious · e0ea5d68341604d7

MALICIOUS

PDF

4.0 KB

MD5: e217f3bb5d7c0e05c6d9a73c097aaf3e SHA-1: 4d94aba67840bf6be50bd5f3069ec13f9280e911 SHA-256: e0ea5d68341604d77a219bb7f8bb6909f11dd3913163ca8eb0f3d3f301ebf2bb

156 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript, including calls to eval() and String.fromCharCode, indicating obfuscated code execution. ML classification and ClamAV detection strongly suggest malicious intent. The embedded JavaScript likely downloads and executes a second-stage payload, as indicated by the 'Pdf.Dropper.Agent-1829023' ClamAV signature.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 6

ClamAV: Pdf.Dropper.Agent-1829023 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-1829023
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` `45f193d7899db3f2998b21d8165b989ad47959e61de977b20902b32e8b22760f`	pdf-javascript-stream	PDF /JS object 13 at offset 0x368	6317 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` `0828497037113eed98d3e92285c81abf11e322d27189e9a3b2210a5d1ed3b515`	deobfuscated-js	PDF AcroForm base64 (decompressed) at offset 0x99D	3585 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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