PDF malware analysis — malicious · 4e039e9f5b5f3287

MALICIOUS

PDF

15.7 KB

MD5: c587906d75c1d6164b1881e51646f9f4 SHA-1: 6d26ef536c31232fc893cb241fa9f750d63652e0 SHA-256: 4e039e9f5b5f3287a3e2af53a07993b7242e0f4cdac0ab00329a45b6d65ef9e0

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File T1566.001 Spearphishing Attachment T1071.001 Web Protocols

The PDF file contains embedded JavaScript with high-confidence heuristic firings for eval() calls and large comment-padded eval stagers. ClamAV also detected this as Pdf.Exploit.Agent-36086. The embedded JavaScript stream, named javascript_obj0006_000.js, is the primary mechanism for exploitation, likely downloading and executing a secondary payload. The lack of readable document body text prevents a more specific determination of the lure, but the technical indicators point to a malicious exploit delivery.

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` `1125c02d55048044dce869eda82916c21d4e84cd877700e4122b2b426ec80832`	pdf-javascript-stream	PDF /JS object 6 at offset 0x143	425689 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.