MALICIOUS
70
Risk Score
Malware Insights
MITRE ATT&CK
T1204.002 Malicious File: User Execution
T1566.002 Phishing: Spearphishing Attachment
The ML classifier strongly indicates this PDF is malicious. The presence of an embedded script payload (PDF_EMBEDDED_SCRIPT_PAYLOAD) suggests the document is designed to execute malicious code. The embedded JavaScript file, 'stream_001_off00000331.js', is the primary artifact likely responsible for delivering the malicious payload. The XFA form and embedded file heuristics further support the malicious nature of the document.
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.js02262c5e01d46a6213ff3904872087be26741f6d0948436d5036c4e360424a9f |
decompressed-pdf-stream | PDF FlateDecoded stream at offset 0x331 | 13597 bytes |
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