PDF malware analysis — malicious · f65f52be7cbdba4b

MALICIOUS

PDF

9.5 KB

MD5: d95df30cacbee7df4c8356546167bb6f SHA-1: b8150a853c4a2bfa7c4951e8187fc1466f0cd48f SHA-256: f65f52be7cbdba4b4907b85a6239af469f4adaa7959203b486052afe857e33e8

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, with a high-confidence heuristic firing for eval() calls and ML classification indicating maliciousness. The JavaScript stream, identified as stream_006_off0000224d.js, is obfuscated and likely responsible for executing a malicious payload. The presence of JavaScript actions and streams within a PDF is a common delivery mechanism for malware.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0016_000.js` `d5c1a6aa4028c29987d8ed50634517ad956ba08f0bd7385e3bb96e559ce192cb`	pdf-javascript-stream	PDF /JS object 16 at offset 0x2046	146 bytes
`stream_006_off0000224d.js` `4289b42c9fcbfe4dc4159e64fbfb9857982871902ba3c8cc599f7819f23b49e0`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x224D	331 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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