PDF malware analysis — malicious · 66e4a30a38ca8710

MALICIOUS

PDF

2.8 KB

MD5: 8064943d1fe0ca00297f03bceb186331 SHA-1: 385b9f5b9b6eaa96d95210ea250eef41d06b7ea9 SHA-256: 66e4a30a38ca87104ed2a17ee052360098feb7cfb52de683fb6c2ddd264f9f91

148 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF contains embedded JavaScript that is heavily obfuscated, indicated by the use of eval() and a custom decoding function. This script is designed to download and execute a secondary payload. The ML classifier strongly flags this PDF as malicious, and the presence of JavaScript exploit cluster heuristics further supports this assessment.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

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.
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (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.
Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0009_000.js` `d32e5646cef263897d7ceafd268926d7b72a795a5dabab560cd39c77ea575eaa`	pdf-javascript-stream	PDF /JS object 9 at offset 0xD6	48848 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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