PDF malware analysis — malicious · 2adcd7461c5e2bb6

MALICIOUS

PDF

118.8 KB

MD5: 1d40c41016b620a61f5989634481d350 SHA-1: dfe177678f1c789972ff382bc66f10f917a06da7 SHA-256: 2adcd7461c5e2bb68ef661b0bea5e84b662ed3e3ac014e1dfa9769569efe7df3

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF contains embedded JavaScript, including obfuscated code with eval() calls and large comment-padded stagers. ClamAV detected this file as 'Pdf.Exploit.Agent-36086', indicating a known exploit. The presence of JavaScript and the ClamAV signature strongly suggest the PDF is designed to exploit vulnerabilities and download further malicious content.

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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0006_000.js` `507a27249f9a986b9eb7a4f1d542a4d466d51a18b05c43b9da0ee54da917e3bf`	pdf-javascript-stream	PDF /JS object 6 at offset 0x143	627083 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).
`legacy_pdfkit_stage_000.js` `60ca8d96b720aa2e6a4b1165a42b19ad7c12692567317a6e74f4f21381f635ec`	deobfuscated-js	double percent-decoded annotation JavaScript at offset 0x143	262144 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 643 long base64-like blob(s).

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