MALICIOUS
166
Risk Score
Malware Insights
MITRE ATT&CK
T1059.007 JavaScript
T1203 Exploitation for Client Execution
T1566.001 Spearphishing Attachment
The file is a PDF containing obfuscated JavaScript, flagged by multiple heuristics and ClamAV as malicious. The JavaScript attempts to decode and execute a payload, likely a downloader, based on its structure and the use of 'eval'. The obfuscation and dynamic execution suggest a malicious intent to compromise the user's system.
Machine Learning
- Nyx PDF Classifier malicious score 0.9989
Heuristics 4
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Hex-obfuscated scripting name object critical PDF_OBFUSCATED_NAME_OBJECTA PDF name object that drives script execution (/JavaScript or /JS) is written with #XX hex escapes to hide it from string-based scanners — e.g. /J#61v#61S#63r#69p#74 decoding to /JavaScript. Legitimate PDF producers always write these names literally; hex-encoding an executable name is a deliberate evasion used by exploit-kit and dropper PDFs.
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ClamAV: Pdf.Exploit.Agent-36142 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Exploit.Agent-36142
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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.
Extracted artifacts 1
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
javascript_obj0010_000.jsd4dce4f95f7146e3b127d68edf45ceb045483a205d9e9a2a53d6e6b80d83b663 |
pdf-javascript-stream | PDF /JS object 10 at offset 0x1230 | 1728 bytes |
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