PDF malware analysis — malicious · 7b4b8236e2b85647

MALICIOUS

PDF

3.2 KB

MD5: b17a440c5e487ecbc66e57336136332f SHA-1: 9b4bbb6272bb6a2308fb86c50fe8aa21c468fa98 SHA-256: 7b4b8236e2b85647734d094b6942fe6d45ee7f7c8f5771a8cff5c67f2f2f22a1

206 Risk Score

Malware Insights

MITRE ATT&CK

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

This PDF file contains embedded JavaScript that utilizes an unescape function, a common technique for obfuscating malicious code. The JavaScript is designed to execute, likely downloading and running a second-stage payload, as indicated by the PDF JavaScript exploit cluster heuristic and ClamAV detection. The ML classifier also strongly suggests maliciousness.

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` `7d7b93deb189f2b9619a1843fe14570d4442d6da7aead1aaa01684ba619dbc31`	pdf-javascript-stream	PDF /JS object 7 at offset 0x9C8	459 bytes

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