MALICIOUS
86
Risk Score
Malware Insights
MITRE ATT&CK
T1059.001 PowerShell
T1204.002 Malicious File
The PDF was flagged for containing embedded JavaScript and an embedded file, indicating a likely attempt to deliver a secondary payload. The heuristic 'PDF_JAVASCRIPT' suggests the script is designed to execute malicious code. The 'PDF_IMAGE_ONLY_LURE' heuristic indicates the PDF itself is not content-rich and likely serves as a container for the malicious script.
Machine Learning
- Nyx PDF Classifier clean score 0.0033
Heuristics 5
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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. (matched inside decoded stream)
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exportDataObject + nLaunch — embedded-file launch-on-open dropper critical PDF_JS_EXPORT_LAUNCH_DROPPERPDF JavaScript calls exportDataObject() with nLaunch set, which extracts the document's embedded file and launches it in its default application. This is a launch-on-open dropper: the embedded file is the payload. No benign workflow auto-launches an extracted PDF attachment. (matched in decompressed stream)
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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. (matched inside decoded stream)
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Embedded file low PDF_EMBEDDEDPDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
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PDF paints image(s) but contains no text operators info PDF_IMAGE_ONLY_LUREPDF has 2 image XObject(s) and the content stream contains no text-emitting operators (BT/ET, Tj, TJ, ', ") in either raw bytes or decompressed streams — this is the screenshot-as-PDF pattern used to bypass text-based scanners and to deliver instructions purely through rendered pixels. It is informational unless paired with invisible links or risky URI context.
Extracted artifacts 2
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
embedded_file_obj0061.bin |
pdf-embedded-file | PDF EmbeddedFile object 61 at offset 0xC24B8 | 1079808 bytes |
SHA-256: 86fdff90584064c135a98f05986da5a03bd67abe414f1d8f5fbdbf4249430019 |
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stream_056_off0016bb85.bin |
decompressed-pdf-stream | PDF FlateDecoded stream at offset 0x16BB85 | 2053 bytes |
SHA-256: ed1ef0ce34f8bc47a9caa2653925cfe155cef35fc74ca96dd4a13c08912f2dcc |
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