MALICIOUS
114
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, indicated by multiple heuristic firings and the presence of a javascript_obj0038_000.js artifact. ClamAV detection as 'Pdf.Exploit.Agent-1991' and the ML classifier's high confidence score further support its malicious nature. The JavaScript is likely responsible for exploiting a vulnerability to execute code, potentially downloading a second-stage payload. The lack of specific indicators for a known family or further payload details leads to an 'unknown family' classification.
Machine Learning
- Nyx PDF Classifier malicious score 0.9873
Heuristics 4
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ClamAV: Pdf.Exploit.Agent-1991 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Exploit.Agent-1991
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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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Optional Content Group with action trigger low PDF_OPTIONAL_CONTENTOptional Content Group (layer) co-occurs with an action trigger — content can be selectively hidden from viewers or scanners while the action still fires on open
Extracted artifacts 1
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
javascript_obj0038_000.jsb9de610cb0e8bbb9ea37346b64a998552deefedd2cb20c8b0a079af805c4b839 |
pdf-javascript-stream | PDF /JS object 38 at offset 0x63A8 | 18030 bytes |
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