Malware Insights
The sample is an RTF document that contains embedded OLE object data and triggers heuristics for Equation Editor exploitation and OLE object activation. This strongly suggests the file is designed to exploit a known vulnerability in the Equation Editor component to achieve arbitrary code execution. The presence of the Equation Editor CLSID and the extobjupdate directive are key indicators of this attack vector. The likely intent is to download and execute a secondary payload, although no specific URLs or scripts were extracted to confirm this.
Heuristics 3
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Equation Editor CLSID critical RTF_EQUATION_EDITOREquation Editor OLE CLSID found inside an OLE object — exploited by CVE-2017-11882 / CVE-2018-0802 / CVE-2018-0798
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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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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_off000018d3.bin3275fc3852490863b97e0ea08ef6d76d34f5370c60f2c5e6628252d12f5cfab4 |
rtf-objdata-decoded | RTF \objdata at offset 0x18D3 | 4685 bytes |
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