PDF / .W malware analysis — malicious · 6068d67bc7b391a3

MALICIOUS

PDF / .W

3.8 KB

MD5: f2c72734e84c10031fc575efff6208c5 SHA-1: 5d5ccb49118acaebfc1e6011b29589b34532a727 SHA-256: 6068d67bc7b391a3eaa6e4f0d521621374b7e7b0894fcadbb0879d465fcc80cb

116 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF sample contains embedded JavaScript that is heavily obfuscated. Heuristics indicate this JavaScript is part of an exploit cluster, likely leveraging a known PDF vulnerability for client execution. The script's primary function appears to be downloading and executing a secondary payload from a remote source, though the exact URL is obfuscated within the script.

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.
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.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (matched inside decoded stream)
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_obj0031_000.js` `59d8ac8a2cad0539484c9a6983d8b5182fa53b25fbbe56e59467d1c59c272793`	pdf-javascript-stream	PDF /JS object 31 at offset 0xC5	16096 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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