PDF malware analysis — malicious · 76f6e464350b05bd

MALICIOUS

PDF

6.4 KB

MD5: aa3919bff7d991f75213cd68aba01f7e SHA-1: 5cfc00821c0436e2ce5205e7d0f9ead6ee8fb9f1 SHA-256: 76f6e464350b05bdb60006c1fb81354da2cb8fedafea7c62c60b1d4f543536fc

196 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and a Flash exploit (exploit.swf), indicating an attempt to leverage known vulnerabilities for code execution. The JavaScript is heavily obfuscated using a common eval-based packing technique, and the unpacked script likely performs malicious actions such as downloading additional payloads. The ML classifier strongly flags this PDF as malicious.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 7

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.
RichMedia (Flash) high PDF_RICHMEDIA

PDF contains /RichMedia (Adobe Flash) which is a historic exploit vector
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
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.
Embedded file low PDF_EMBEDDED

PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`exploit.swf` `580c06d2753ffe9a811fb006f7576905585831e0ae7879169ce984917f9ba79d`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0x4D4	3764 bytes
`javascript_obj0017_000.js` `7de29db79dcd52398753093a18d491cd08457303cba28c9cf4f700a7a7570a3e`	pdf-javascript-stream	PDF /JS object 17 at offset 0x143C	877 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0017_001.js` `f7e85fb2a2a282a721d45b313211eba2df789238f1c42c1f8c805b8d2e840725`	pdf-javascript-stream	PDF /JS object 17 at offset 0x143C	35 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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