MALICIOUS
88
Risk Score
Malware Insights
MITRE ATT&CK
T1059.001 PowerShell
The PDF contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The ML classifier strongly flags this PDF as malicious. The unescape() call suggests obfuscation within the JavaScript, which is further supported by the 'Script obfuscation indicators' signal associated with the extracted javascript_obj0007_000.js file. The likely intent of the embedded script is to download and execute a secondary payload, a common technique for initial access.
Machine Learning
- Nyx PDF Classifier malicious score 1.0000
Heuristics 4
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unescape() call high PDF_UNESCAPEunescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
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JavaScript action low PDF_JAVASCRIPTPDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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Embedded JS stream low PDF_JSPDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGEOne 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_obj0007_000.js40d2fb4312bfd5453e8d75c68c56062850ab7de5c86dada838935e031b0302f6 |
pdf-javascript-stream | PDF /JS object 7 at offset 0x233 | 47867 bytes |
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Detection
ClamAV:
No threats found
Obfuscation or payload:
likely
Carved artifact contains 244 eval/decoder/string-building token(s).
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