PDF malware analysis — malicious · 5e7acd75fdbcb3a9

MALICIOUS

PDF

3.2 KB

MD5: ca091cf6fa2ccd916768bd61b77080f6 SHA-1: 12351109e891c8b2882c153f9ed71e665dc6edda SHA-256: 5e7acd75fdbcb3a9ef7ef6a63674ca6072a168eb2b3d3c0154e73b1d10fb84b2

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 utilizes the unescape() function, a common indicator of exploit attempts. The script appears to be designed to download and execute a second-stage payload, as suggested by the ML classifier and ClamAV detection. The specific exploit cluster and ClamAV signature point towards a known 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` `9f00af4243166f53774401d0f6c11afc58ed38f1ac545e06eef5f262c542b415`	pdf-javascript-stream	PDF /JS object 7 at offset 0x9C3	440 bytes

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