PDF malware analysis — malicious · eb00c4c29986b6e9

MALICIOUS

PDF

9.4 KB Created: 2009-08-04 22:47:12 Authoring application: XEKjnXgQdgiIFCti (via xbhYSDUXhMEItcJO)

MD5: de5ab0ed89c85d2ec65e9f63d898b1cc SHA-1: c73fe67d0599c647dbc5da1d59d38e8016fe89ad SHA-256: eb00c4c29986b6e99df970908a4d088fc1194477cc40ac6a0846fc27b47d81bc

156 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The file is a PDF containing embedded JavaScript, flagged by multiple heuristics including PDF_JAVASCRIPT, PDF_JS, and a high-confidence PDF_EVAL. The ML classifier and ClamAV detection strongly indicate malicious intent, identifying it as Pdf.Dropper.Agent-7319810-0. The presence of obfuscated JavaScript streams, specifically javascript_obj0007_000.js and javascript_obj0007_001.js, suggests the document's primary purpose is to execute malicious code, likely to download and run a secondary payload.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 6

ClamAV: Pdf.Dropper.Agent-7319810-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7319810-0
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.
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_obj0007_000.js` `b445596828e36343833460de628df9396fea69c1b45997d65f99933edbc899fd`	pdf-javascript-stream	PDF /JS object 7 at offset 0x485	6412 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`javascript_obj0007_001.js` `fc10b13e994e3df55f9c52cedce3acc1c510739784d2aa8f7d79509ac4e4f865`	pdf-javascript-stream	PDF /JS object 7 at offset 0x485	3185 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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