PDF malware analysis — malicious · f9565077d685764b

MALICIOUS

PDF

13.0 KB

MD5: 2f0820180c8ff50bca5ea69f4df82a64 SHA-1: a59af6750b854d198d9b19bb34287854338555ac SHA-256: f9565077d685764b9e219358d4a64e2165fd8ac157fa46c955a5e35112aad894

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File

The PDF file contains embedded JavaScript and utilizes ASCIIHexDecode filters, which are common indicators of malicious PDFs. The ML classifier strongly flags this file as malicious. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload, although the specific actions are not fully discernible due to obfuscation.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 3

ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX

Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
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_obj0006_000.js` `b5e469c0993d69548b5135961dfee6f48d79a128e3bd5c85e255a4879d1f5eea`	pdf-javascript-stream	PDF /JS object 6 at offset 0x12D	15948 bytes

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