MALICIOUS
240
Risk Score
Malware Insights
MITRE ATT&CK
T1203 Exploitation for Client Execution
T1566.001 Spearphishing Attachment
The RTF file contains embedded OLE object data and specifically triggers heuristics related to Equation Editor and CVE-2017-11882. This indicates the file is designed to exploit this known vulnerability for client-side code execution. The presence of the ".objupdate" directive further suggests an attempt to activate the embedded OLE object, likely to trigger the exploit. No specific family could be identified, but the exploit vector is clear.
Heuristics 5
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Equation Editor CLSID critical CVE likely 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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CVE-2017-11882 — Equation Editor FONT record overflow critical CVE likely CVE_2017_11882Equation Editor MTEF contains an overlong FONT typeface field, the vulnerable copy primitive for CVE-2017-11882. This is stronger evidence than the Equation Editor CLSID alone because it identifies the malformed record that drives code execution in EQNEDT32.EXE.
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ClamAV: Doc.Exploit.CVE_2017_11882-6934206-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Doc.Exploit.CVE_2017_11882-6934206-0
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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 1 \objdata section(s) — embedded OLE objects
Extracted artifacts 1
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
objdata_00_off0000003b.bin |
rtf-objdata-decoded | RTF \objdata at offset 0x3B | 4133 bytes |
SHA-256: c1f23ab4a9b8275bd63e987ecb8017e53ffd3fde2cbc1b58fb36549b0c8357f8 |
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