PDF malware analysis — malicious · 10070fa5ca6bdfbd

MALICIOUS

PDF

3.2 KB

MD5: 5ceaf4826b3220cb2bb5b80154f78b3f SHA-1: 3411689585a11b33280d89bbe2ff61b37079bd86 SHA-256: 10070fa5ca6bdfbd0ba2c22778e2fe135d121e66e009f944ee7b9ce0c83e985a

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 the unescape function, a common indicator of exploit activity. The script attempts to deobfuscate and execute code, likely to download and run a secondary malicious payload. The ML classifier and ClamAV detection strongly indicate malicious intent, pointing towards an exploit targeting PDF viewers.

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` `de127f93cb49b57e96b1e985c7c5d3d76a419088ff4c53043ecf07574e1ec50d`	pdf-javascript-stream	PDF /JS object 7 at offset 0x9C5	484 bytes

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