MALICIOUS
216
Risk Score
Malware Insights
MITRE ATT&CK
T1059.001 PowerShell
The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The presence of a PDF_EVAL heuristic firing suggests that the JavaScript code is being used to execute arbitrary commands. The extracted artifact 'javascript_obj0055_001.js' was flagged for obfuscation, further supporting malicious intent. The likely purpose of this script is to download and execute a second-stage payload, as suggested by the suspicious extracted artifact details. No specific malware family could be identified.
Machine Learning
- Nyx PDF Classifier malicious score 0.9988
Heuristics 5
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JavaScript action low 2 related findings 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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PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTERPDF combines an executable JavaScript/action surface with exploit staging indicators such as eval/unescape/fromCharCode, XFA script content, or a related CVE pattern. Benign form JavaScript remains low-severity, but this correlated cluster is high-confidence malicious behavior.Matched line in script
stream eval('\x66\x75\x6e\x63\x74\x69\x6f\x6e\x20\x4e\x65\x77\x5f\x53\x63\x72\x69\x70\x74\x28\x29\x0a\x7b\x0a\x76\x61\x72\x20\x63\x6b\x57\x6f\x72\x64\x2c\x20\x6e\x75\x6d\x57\x6f\x72\x64\x73\x3b\x0a\x76\x61\x72\x20\x74\x65\x78\x74\x20\x3d\x20\x27\x27\x3b\x0a\x0a\x66\x6f\x72\x20\x28\x76\x61\x72\x20\x69\x20\x3d\x20\x30\x3b\x20\x69\x20\x3c\x20\x74\x68\x69\x73\x2e\x6e\x75\x6d\x50\x61\x67\x65\x73\x3b\x20\x69\x2b\x2b\x20\x29\x20\x0a\x7b\x0a\x6e\x75\x6d\x57\x6f\x72\x64\x73\x20\x3d\x20\x74\x68\x69\x73\x2e\x67\x … endstream -
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 medium 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.
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Embedded URL info EMBEDDED_URLOne or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.URL http://www.monotype.comMonotype In PDF document text
- http://ocsp.verisign.com/ocsp/status0In PDF document text
- https://www.verisign.com/rpa0In PDF document text
- http://www.monotype.com/html/mtname/ms_timesnewroman.htmlhttp://www.monotype.com/html/mtname/ms_welcome.htmlhttp://www.monotype.com/html/type/license.htmlIn PDF document text
- https://www.verisign.com/rpaIn PDF document text
- http://crl.microsoft.com/pki/crl/products/CodeSignPCA.crl0In PDF document text
- http://www.microsoft.com/typographyIn PDF document text
Extracted artifacts 1
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
javascript_obj0055_001.js |
pdf-javascript-stream | PDF /JS object 55 at offset 0x13DBAE | 6768 bytes |
SHA-256: 7d2e9b85cacd9024f0912f7e7bc59955748b8226c71953d342a2a204a09a5185 |
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Detection
ClamAV:
No threats found
Obfuscation or payload:
likely
Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long hex-escaped blob(s).
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Preview scriptFirst 1,000 lines of the extracted script
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