MALICIOUS
180
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The RTF document contains multiple high-severity heuristics indicating the presence and activation of OLE objects, including excessive hex-encoded data likely hiding a payload. The ".bin" file extracted from the OLE object data is substantial, suggesting it is the primary malicious component. The file's structure and heuristics strongly suggest it is delivered as a spearphishing attachment designed to exploit OLE vulnerabilities for initial execution.
Heuristics 5
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Ole10Native stream in RTF OLE object high RTF_OLE10NATIVE_STREAMRTF contains an embedded OLE object with an Ole10Native stream. This is a strong payload-container signal and is related to Word/OLE exploit delivery, but it is not specific enough on its own to assign a CVE.
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Automatically linked OLE object high RTF_OBJAUTLINKRTF contains \objautlink — an automatically linked OLE object surface that can be updated or activated when Word opens the document.
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\objupdate forces OLE activation high RTF_OBJUPDATERTF contains \objupdate — forces automatic OLE object instantiation when the document is opened, bypassing user interaction. Almost exclusively seen in Equation Editor exploit documents.
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Large hex data blocks in OLE object high RTF_EXCESSIVE_HEXRTF contains ~4985KB of hex-encoded data inside \objdata sections — may hide a payload
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OLE object data medium RTF_OBJDATARTF contains 2 \objdata section(s) — embedded OLE objects
Extracted artifacts 1
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
objdata_00_off00000087.bina6cbdba2677f9b79bc4c41008772715050c1de55167984efe0207fc0e10e2f3d |
rtf-objdata-decoded | RTF \objdata at offset 0x87 | 996423 bytes |
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