MALICIOUS
150
Risk Score
Malware Insights
MITRE ATT&CK
T1059.007 JavaScript
T1203 Exploitation for Client Execution
T1566.001 Spearphishing Attachment
The PDF file contains embedded JavaScript, flagged as an exploit cluster, which is likely used to execute malicious code. The JavaScript is obfuscated and uses eval, indicating an attempt to hide its true behavior, which is common for downloaders. The presence of an embedded URL suggests a connection to a remote resource for further stages of the attack.
Machine Learning
- Nyx PDF Classifier malicious score 1.0000
Heuristics 6
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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.
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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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Encrypted PDF carries /JavaScript — payload hidden from static analysis high PDF_ENCRYPTED_WITH_JSPDF declares /Encrypt and also references an executable trigger (/JavaScript). Document encryption hides the JavaScript body and stream contents from static scanners — combined with auto-execution indicators this is a known evasion pattern used to deliver weaponised JavaScript that the analyst cannot inspect without the decryption key.
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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.
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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.cadkas.com In PDF document text
Extracted artifacts 2
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
javascript_obj0020_000.js |
pdf-javascript-stream | PDF /JS object 20 at offset 0x69F8 | 46 bytes |
SHA-256: d3b3619843a9765d54ecc0d81f8728e633434bc486e3888d07256848d199d3df |
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Detection
ClamAV:
No threats found
Obfuscation or payload:
likely
Carved artifact contains 2 eval/decoder/string-building token(s).
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Preview scriptFirst 1,000 lines of the extracted script
eval('eval("'+this.getField("e").value+'");');
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javascript_obj0021_000.js |
pdf-javascript-stream | PDF /JS object 21 at offset 0x1847 | 46 bytes |
SHA-256: 11dd3dd5217a269b6e477c77d269b1bf182a5c6d0f312ad5b43892728b614d88 |
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Preview scriptFirst 1,000 lines of the extracted script
x�h��W�ۣ� y� `�]���ӎg_u��� v � j�T[�7ا�R�� |
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