MALICIOUS
140
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1204.002 Malicious File
The RTF document contains embedded OLE objects with large amounts of hex-encoded data, indicated by RTF_EXCESSIVE_HEX and RTF_OLE10NATIVE_STREAM heuristics. The ".objupdate" directive suggests that these embedded objects are intended to be activated, likely to execute a hidden payload. The presence of the objdata_00_off000000fa.bin artifact further supports the delivery of a secondary payload.
Heuristics 4
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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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\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 ~2529KB 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_off000000fa.bina9dced1be3a8ae8ec902a56476bd729e6bdd614866b7cc83fa887eb00e3a5e72 |
rtf-objdata-decoded | RTF \objdata at offset 0xFA | 1024703 bytes |
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