PDF malware analysis — malicious · e6a9eb2d8d0ff7f7

MALICIOUS

PDF

118.5 KB

MD5: 9cde83ccb4ccea017c28af50ff84f003 SHA-1: 0017170c4c955a6c4d02d461c881be5ecc8f937d SHA-256: e6a9eb2d8d0ff7f7efb47d280eedbd421bf6180bf389ccc1020e4ee669bf738d

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, with high-confidence heuristics indicating the use of 'eval()' and a 'Large comment-padded JavaScript eval stager'. ClamAV also detected it as 'Pdf.Exploit.Agent-36086'. These indicators suggest the JavaScript is designed to exploit vulnerabilities within the PDF reader to download and execute 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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0006_000.js` `1652040440de2bb727ff1dbc9b60e4ece68b609eb38ce3b7680f42a89eff23ea`	pdf-javascript-stream	PDF /JS object 6 at offset 0x143	626668 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` `f6203d6d258005b892550b343bb59c016848b76611ea8d6b6e34c8c081bf0cf7`	deobfuscated-js	double percent-decoded annotation JavaScript at offset 0x143	262144 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 565 long base64-like blob(s).

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