PDF / .PHP malware analysis — malicious · 7b235923a694b03c

MALICIOUS

PDF / .PHP

3.2 KB

MD5: 9ab49ecab35f9c33597b8c845b398e72 SHA-1: c0ec6aab05f803a954e3516c6ad605c24190f85a SHA-256: 7b235923a694b03cc8d33afa68530a96baa35bcb186d87946b57b329890c3b71

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 is heavily obfuscated. The script utilizes the `unescape()` function and string concatenation to decode a payload, likely for execution. Heuristics indicate a PDF JavaScript exploit cluster, and ClamAV identifies it as Pdf.Exploit.Agent-36121, strongly suggesting it's a malicious exploit document.

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` `13549fa933154ce30a967c162df2fabe25bd8eafaaf684648c37558cb3f0f04e`	pdf-javascript-stream	PDF /JS object 7 at offset 0x9C9	429 bytes

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