MALICIOUS
66
Risk Score
Malware Insights
MITRE ATT&CK
T1059.001 PowerShell
T1204.002 Malicious File
The PDF file was flagged by a machine learning classifier as malicious with a very high confidence score. Static analysis revealed an embedded JavaScript payload within a PDF stream. This script is the primary indicator of malicious activity, likely serving as a downloader or exploit loader. The presence of an embedded file and XFA form are secondary indicators.
Machine Learning
- Nyx PDF Classifier malicious score 1.0000
Heuristics 3
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Embedded script payload in PDF stream medium PDF_EMBEDDED_SCRIPT_PAYLOADPDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
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Embedded file low PDF_EMBEDDEDPDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
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XFA form low PDF_XFAPDF uses XML Forms Architecture — can contain script logic
Extracted artifacts 1
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
stream_001_off00000331.js3ec238f3fbf11b30d70bd67ef489d3d3577911f905082f47f46533196003c54e |
decompressed-pdf-stream | PDF FlateDecoded stream at offset 0x331 | 13521 bytes |
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