MALICIOUS
240
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1204.002 Malicious File
The RTF document contains multiple indicators of malicious OLE object embedding and automatic linking, specifically related to CVE-2017-8570. The document body explicitly instructs the user to 'click Enable Editing when opening', which is a lure to bypass security measures and execute embedded malicious content, likely a script dropped via the Composite Moniker vulnerability.
Heuristics 7
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Composite Moniker — CVE-2017-8570 (drops SCT script) critical CVE_2017_8570RTF \objdata decodes to OLE data containing the Composite Moniker — CVE-2017-8570 (drops SCT script) CLSID — the vulnerable control/moniker is embedded directly in the document's object stream, the delivery shape of this exploit. RTF objects auto-render when Word opens the file.
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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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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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OLE object data medium RTF_OBJDATARTF contains 3 \objdata section(s) — embedded OLE objects
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Embedded OLE object medium RTF_OBJEMBRTF contains \objemb — embedded OLE object
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Macro/content-enable lure medium SE_ENABLE_LUREDocument instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
Extracted artifacts 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
objdata_00_off00000965.bin6ef88f2a05802e23cf09dae48c88949dc094b8cd6634aa1c301fa1cb70e680e5 |
rtf-objdata-decoded | RTF \objdata at offset 0x965 | 19484 bytes |
objdata_01_off0000a854.bin18cff8ef194415d33763880bf64011d23305e4b9143b76244b89e1c53b70a0d5 |
rtf-objdata-decoded | RTF \objdata at offset 0xA854 | 2632 bytes |
objdata_02_off0000bdf7.bin44deae4627fee3c44f54d5bd10477ec2e17f4c08135f08e2417832e36d10d037 |
rtf-objdata-decoded | RTF \objdata at offset 0xBDF7 | 12297 bytes |
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