MALICIOUS
200
Risk Score
Malware Insights
MITRE ATT&CK
T1204.002 Malicious File Execution: Malicious File
T1566.001 Phishing: Spearphishing Attachment
The sample is an RTF document containing an embedded OLE object, specifically targeting the Equation Editor vulnerability (CVE-2018-0802). The critical heuristic firings and ClamAV detection strongly indicate exploitation of this vulnerability. The embedded OLE object and the ".objupdate" directive suggest an attempt to automatically activate the exploit upon opening the document, leading to the execution of a malicious payload.
Heuristics 5
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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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ClamAV: Rtf.Exploit.CVE_2018_0802-6825822-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Rtf.Exploit.CVE_2018_0802-6825822-0
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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
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Embedded OLE object medium RTF_OBJEMBRTF contains \objemb — embedded OLE object
Extracted artifacts 1
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
objdata_00_off000011d8.binc43d3709dea00a5fd39930916a50dc7a6e37a85f7b214154e4e6d2011577791a |
rtf-objdata-decoded | RTF \objdata at offset 0x11D8 | 4156 bytes |
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