MALICIOUS
146
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 including PDF_JAVASCRIPT, PDF_JS, and PDF_JS_EXPLOIT_CLUSTER. The JavaScript stream, named javascript_obj0032_000.js, is heavily obfuscated and truncated, but the presence of eval() calls suggests it is designed to execute arbitrary code. This likely serves to download and execute a second-stage payload, a common technique for PDF-based malware.
Machine Learning
- Nyx PDF Classifier malicious score 1.0000
Heuristics 4
-
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.
-
eval() call high PDF_EVALeval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
-
JavaScript action low PDF_JAVASCRIPTPDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
-
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_obj0032_000.js24cb1d73db0430ab397e6472ed0ed8c7b0e22678a9b3ac1c1ac269f20dd27558 |
pdf-javascript-stream | PDF /JS object 32 at offset 0x2CA | 2955056 bytes |
Open this report in the interactive analyzer, or submit your own file for analysis.