PDF malware analysis — malicious · f60114745a145bea

MALICIOUS

PDF

118.7 KB

MD5: 9c23237f0d9e1cda582ef2a081ba4bb0 SHA-1: 932992fb5ae94fb289fcd0d1a72a1f44e81714d1 SHA-256: f60114745a145bea51bc4780838518d7f4262e8a36e7aa111ac7eb609b0dcadf

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF contains embedded JavaScript, with heuristics indicating the use of eval() and a large comment-padded eval stager. ClamAV detected this as Pdf.Exploit.Agent-36086. The embedded JavaScript is heavily obfuscated, but the presence of eval() and fromCharCode suggests it is designed to decode and execute further malicious code, likely a downloader for a second-stage payload.

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` `38e1fce8f01ca4ab7dc3bc1e81b2d9488fbdced48c25f22d95faa87c52d8c346`	pdf-javascript-stream	PDF /JS object 6 at offset 0x143	626311 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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