MALICIOUS
64
Risk Score
Malware Insights
MITRE ATT&CK
T1059.001 PowerShell
T1566.001 Spearphishing Attachment
The PDF file is encrypted and contains embedded JavaScript, indicating an attempt to obscure malicious content. The JavaScript stream, named 'javascript_obj0009_000.js', is likely responsible for executing the payload. The presence of PDF_ENCRYPTED_WITH_JS and PDF_JAVASCRIPT heuristics strongly suggests this is a delivery mechanism for further malicious activity, such as phishing or malware deployment.
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.jsc291cf8186173f9d42e3dc0cb0ab66f0c63548414d4285bbee78f64b81623504 |
pdf-javascript-stream | PDF /JS object 9 at offset 0x3D3 | 26658 bytes |
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