PDF malware analysis — malicious · 566afdbd8fb88c37

MALICIOUS

PDF

118.7 KB

MD5: 3325a7dd840eaeb43a6feef44eac82a9 SHA-1: b83ef5f0dcdca664c5a2d932ffd1e8d69640de50 SHA-256: 566afdbd8fb88c37328ac1d7cff2156fa3ad8e5b7d4c719f9be2b125bf02961d

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF file contains multiple JavaScript streams, including one with a large comment-padded eval stager. The ClamAV detection 'Pdf.Exploit.Agent-36086' strongly suggests this is a malicious PDF exploiting vulnerabilities. The presence of eval() and String.fromCharCode indicates obfuscated JavaScript, likely used to download and execute a second-stage payload. No specific family could be identified due to the obfuscation.

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` `d391b24e885b4186a61efd866855f56a9abe97a84dbbc35bf154e1bba6a2f883`	pdf-javascript-stream	PDF /JS object 6 at offset 0x143	626793 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).

Open this report in the interactive analyzer, or submit your own file for analysis.