PDF malware analysis — malicious · 6c84b610a93f617e

MALICIOUS

PDF

3.2 KB

MD5: 6b2eb5e13179bb97728b0dc5f2081861 SHA-1: c767ea4e3c278828879eacbd45510a161736c2b8 SHA-256: 6c84b610a93f617ec27b1772867daaa776c6acf3d13037c6bdf7113fd6959dcc

206 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains embedded JavaScript that is obfuscated but appears to be designed to exploit a known vulnerability. The script utilizes the `unescape()` function and calls `this.info.title` to construct a string, which is then passed to an `eval`-like function. This indicates an attempt to execute arbitrary code, likely to download and run a second-stage payload.

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` `5bbb57d74691af1b478dfda5c6323a6d26170273c674655c248cd7cdf7c3f774`	pdf-javascript-stream	PDF /JS object 7 at offset 0x9C9	507 bytes

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