MALICIOUS
64
Risk Score
Malware Insights
MITRE ATT&CK
T1059.001 PowerShell
The PDF file is encrypted and contains embedded JavaScript, a common technique to hide malicious payloads from static analysis. The presence of PDF_ENCRYPTED_WITH_JS and PDF_JAVASCRIPT heuristics indicates that the JavaScript is likely used to decrypt or execute the hidden content. While the specific JavaScript code was not provided in detail, its presence within an encrypted PDF strongly suggests it's designed to download and execute a secondary stage. The file type and encryption method point towards a downloader or dropper.
Heuristics 4
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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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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_obj0009_000.js2cbc9ae8425de5791d8e13b6362b37ec256a568d1fd10c1bb6964ae19f3f05a6 |
pdf-javascript-stream | PDF /JS object 9 at offset 0x3C0 | 31860 bytes |
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