PDF malware analysis — malicious · 018257c96f1d6c5e

MALICIOUS

PDF

3.2 KB

MD5: 5c02c758345d77c7602cac285eb11b7e SHA-1: d32dbfea691c347fa760ee3dcb44a93f0d6073d0 SHA-256: 018257c96f1d6c5e1e511b13a855989a47cc050037d3d324577d17a9996feb57

206 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.002 Malicious File

The PDF contains embedded JavaScript that utilizes an unescape function, a common technique for obfuscating malicious code. The script appears to extract and execute a string derived from the PDF's title metadata, likely to download and run a secondary payload. Heuristics and ClamAV detection strongly indicate this is a malicious PDF exploit.

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` `bd8ac3dfff3d0b5c1d20c04bd73130dd838751de66f0984b8949fad6ce17cc0a`	pdf-javascript-stream	PDF /JS object 7 at offset 0x9C0	466 bytes

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