PDF malware analysis — malicious · ffe00e894f92ee90

MALICIOUS

PDF

15.7 KB

MD5: c94f0cc56bced175cbfff63e5b955660 SHA-1: 9e1f20ad79397171d15392d53fad896916c85a98 SHA-256: ffe00e894f92ee900bfe7609aa110718af576fc2213246b0fc44cb13c596c595

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript, including a large, comment-padded eval stager. This JavaScript is heavily obfuscated and uses String.fromCharCode, indicating an attempt to hide malicious code. The ClamAV detection 'Pdf.Exploit.Agent-36086' strongly suggests this is an exploit document. The primary attack vector appears to be the execution of obfuscated JavaScript from within the PDF, which likely leads to a second-stage payload download or exploit execution.

Heuristics 7

ClamAV: Pdf.Exploit.Agent-36086 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36086
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
Large comment-padded JavaScript eval stager high PDF_JS_LARGE_COMMENT_PADDED_EVAL

PDF JavaScript contains a very large stream padded with long random-looking block comments around String.fromCharCode and eval. This is an exploit-kit obfuscation shape used to bury a decoder and recovered stage inside noise, not normal PDF form automation.
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_obj0006_000.js` `7a84f1e8883595974ef94271dae78e90d54a411f9ea7bb7d5a757f9dc8140bcf`	pdf-javascript-stream	PDF /JS object 6 at offset 0x143	425443 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 42 long base64-like blob(s).

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