MALICIOUS
66
Risk Score
Malware Insights
MITRE ATT&CK
T1204.002 Malicious File
T1566.002 Spearphishing Attachment
The PDF file was flagged as malicious by an ML classifier with high confidence. Heuristics indicate the presence of an embedded script payload within a PDF stream, suggesting an attempt to execute malicious code. The embedded JavaScript file, 'stream_001_off00000309.js', is the primary indicator of malicious activity and likely contains the mechanism for delivering a secondary payload or exploiting a vulnerability.
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_off00000309.js57675bc970addff0c5f4b531343067969830462969e797dfabb27eb1ca431003 |
decompressed-pdf-stream | PDF FlateDecoded stream at offset 0x309 | 13251 bytes |
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