MALICIOUS
122
Risk Score
Malware Insights
MITRE ATT&CK
T1203 Exploitation for Client Execution
T1566.001 Spearphishing Attachment
The RTF document contains OLE object data and specifically triggers the Equation Editor vulnerability, indicating exploitation for client execution. The embedded OLE object, objdata_00_off00001161.bin, is likely the malicious payload or a component thereof. The presence of ".objupdate" suggests an attempt to automatically activate the embedded object, facilitating the exploit. Given these factors, the most probable attack pattern is a spearphishing attachment leading to exploitation.
Heuristics 4
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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 1 \objdata section(s) — embedded OLE objects
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Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGEOne or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
Extracted artifacts 1
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
objdata_00_off00001161.bin905f2190c0e66fce447fe53e76e990d945e6f011003263b8e12be2f191b46a49 |
rtf-objdata-decoded | RTF \objdata at offset 0x1161 | 64063 bytes |
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Detection
ClamAV:
No threats found
Obfuscation or payload:
likely
Carved artifact entropy is 7.93, consistent with packed or encrypted content.
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