PDF malware analysis — malicious · 6e465f6ff625bdec

MALICIOUS

PDF

3.2 KB

MD5: d39fe3e677e4467651f1372385a20030 SHA-1: 6906513d48a206d8a3533871e4cdaebf6014d3d1 SHA-256: 6e465f6ff625bdecf78342ec68f304f252415c8698c9776552b3d5d959d8b500

206 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript that is obfuscated but appears to be designed to exploit a vulnerability. The JavaScript uses an unescape function and is flagged by multiple heuristics as a PDF JavaScript exploit. The script attempts to call a function that likely downloads and executes a secondary payload, indicated by the 'Pdf.Exploit.Agent-36121' ClamAV detection.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 5

PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTER

PDF combines an executable JavaScript/action surface with exploit staging indicators such as eval/unescape/fromCharCode, XFA script content, or a related CVE pattern. Benign form JavaScript remains low-severity, but this correlated cluster is high-confidence malicious behavior.
ClamAV: Pdf.Exploit.Agent-36121 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36121
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `9ea414449a1476a23da580895edb01d5120afd080910372cbd3f8087958b2529`	pdf-javascript-stream	PDF /JS object 7 at offset 0x9CD	469 bytes

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