PDF malware analysis — malicious · e6e3000244aa7183

MALICIOUS

PDF

118.7 KB

MD5: 65489dbbfc9c65e36fbb1b029aed5c84 SHA-1: faf5229e4d83ace815eebd4e337b3f970631eb9e SHA-256: e6e3000244aa71835d6bb8dc2185f82ceac2e4ff78373cc67329ed58c3284b95

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The file is identified as malicious by ClamAV with the signature Pdf.Exploit.Agent-36086. Static analysis revealed multiple JavaScript-related heuristics, including eval() calls and a large comment-padded JavaScript eval stager. These indicate the PDF is designed to execute obfuscated JavaScript, likely to download and execute a second-stage payload. The document body was unreadable, but the presence of JavaScript and the ClamAV signature strongly suggest an exploit delivery mechanism.

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` `28e45ba69f0c7a579810818d282dcb17df409a2ab69f688becac596370d16855`	pdf-javascript-stream	PDF /JS object 6 at offset 0x143	626910 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` `9aa885612bbf569f5287bec09860f79ac18bed3cfa48647ddbb9661ae38d4a39`	deobfuscated-js	double percent-decoded annotation JavaScript at offset 0x143	262144 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 719 long base64-like blob(s).

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