MALICIOUS
68
Risk Score
Malware Insights
MITRE ATT&CK
T1204.002 Malicious File
The PDF contains an embedded JavaScript file, indicated by the PDF_EMBEDDED_SCRIPT_PAYLOAD heuristic. The ML classifier strongly flags this PDF as malicious. The embedded JavaScript is the likely mechanism for delivering a second-stage payload. No document body text was available for analysis, but the presence of the embedded script and the high ML score are sufficient indicators.
Machine Learning
- Nyx PDF Classifier malicious score 1.0000
Heuristics 4
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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
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Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTALThe same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
Extracted artifacts 1
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
stream_001_off00000331.js512e1ded53b19a997424cd6363fba3fbed2c4605d42a0a6e5e753ba5b7d73fd1 |
decompressed-pdf-stream | PDF FlateDecoded stream at offset 0x331 | 13497 bytes |
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