MALICIOUS
340
Risk Score
Malware Insights
MITRE ATT&CK
T1203 Exploitation for Client Execution
The RTF file contains multiple indicators of exploitation, including OLE object data, automatic linking, and a critical finding for the Equation Editor CLSID, strongly suggesting exploitation of CVE-2017-11882. ClamAV also explicitly detected this CVE. The large amount of hex-encoded data within the OLE object likely hides the malicious payload. While no scripts were directly extracted, the nature of the exploit implies a download and execution of a second-stage payload.
Heuristics 8
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Composite Moniker in RTF OLE object high RTF_COMPOSITE_MONIKER_RELATEDRTF contains Composite Moniker CLSID in OLE object context, but no nearby scriptlet/SCT payload was confirmed. Treat as related moniker attack-surface evidence rather than proof of CVE-2017-8570 exploitation.
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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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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_2017_11882-6584355-1 critical CLAMAV_DETECTIONClamAV detected this file as malware: Rtf.Exploit.CVE_2017_11882-6584355-1
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Automatically linked OLE object high RTF_OBJAUTLINKRTF contains \objautlink — an automatically linked OLE object surface that can be updated or activated when Word opens the document.
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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 ~1603KB 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_off00001241.bin661be8b409af889f000864851165717703019f0204b15e5adb26fe016a0a0b94 |
rtf-objdata-decoded | RTF \objdata at offset 0x1241 | 801867 bytes |
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