MALICIOUS
88
Risk Score
Malware Insights
MITRE ATT&CK
T1059.001 PowerShell
T1140 Deobfuscate/Decode Files or Information
The PDF file contains embedded JavaScript, flagged by multiple heuristics including ML classification and specific PDF JavaScript rules. The ML classifier output of 0.999956 strongly indicates malicious intent. The presence of an unescape() call and obfuscated JavaScript suggests the script is designed to decode and execute a payload. While the exact payload could not be determined due to obfuscation, the overall pattern points to a downloader.
Machine Learning
- Nyx PDF Classifier malicious score 1.0000
Heuristics 4
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unescape() call high PDF_UNESCAPEunescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
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JavaScript action low PDF_JAVASCRIPTPDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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Embedded JS stream low PDF_JSPDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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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 |
|---|---|---|---|
javascript_obj0009_000.js96a0c5f99218844611c30d826f0b5f0a8344c2adc8bf660e83d484a08111fe8e |
pdf-javascript-stream | PDF /JS object 9 at offset 0xD6 | 6175 bytes |
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Detection
ClamAV:
No threats found
Obfuscation or payload:
likely
Carved artifact contains 7 eval/decoder/string-building token(s).
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