MALICIOUS
70
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1027 Obfuscated Files or Information
The PDF contains an embedded file, indicated by the PDF_EMBEDDED heuristic. The ML classifier strongly flags this PDF as malicious, and a PDF_EMBEDDED_SCRIPT_PAYLOAD heuristic suggests an embedded script is present. The embedded file 'embedded_file_obj0011.bin' is likely the malicious payload. The document body text is heavily obfuscated and appears to be corrupted or intentionally unreadable, further supporting a malicious intent.
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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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 |
|---|---|---|---|
embedded_file_obj0011.binc97d8e70c3c4fc9c34b2face5deeeb60e7edfaa09b45ba44cd70db8991089bac |
pdf-embedded-file | PDF EmbeddedFile object 11 at offset 0xB97 | 6934 bytes |
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Detection
ClamAV:
No threats found
Obfuscation or payload:
likely
Carved artifact contains 4 long base64-like blob(s).
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