MALICIOUS
60
Risk Score
Malware Insights
MITRE ATT&CK
T1059.001 PowerShell
The PDF contains an embedded JavaScript payload, flagged by both heuristics and ML classification. The deobfuscated JavaScript, named 'acroform_b64_00.js', likely serves as the primary mechanism for delivering a malicious payload. The presence of XFA forms further suggests a complex PDF structure designed to conceal malicious activity. The exact nature of the payload is not fully discernible from the provided information, but the overall pattern indicates a downloader or exploit delivery.
Machine Learning
- Nyx PDF Classifier malicious score 0.9997
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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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 2
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
stream_002_off00001d16.jseff3119d949d5eb96f68c7a68a482eb5d407e75ab0927f94c14c967fe33071b9 |
decompressed-pdf-stream | PDF FlateDecoded stream at offset 0x1D16 | 5463 bytes |
acroform_b64_00.jsf4f7c9b41a571e79ffb975d399fa3f51170a8891974b6abe44a8ef9b5a7851e6 |
deobfuscated-js | PDF AcroForm base64 (decompressed) at offset 0xE9 | 8804 bytes |
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Detection
ClamAV:
No threats found
Obfuscation or payload:
likely
Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 3 long base64-like blob(s).
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