MALICIOUS
240
Risk Score
Malware Insights
MITRE ATT&CK
T1203 Exploitation for Client Execution
The RTF document contains multiple indicators of malicious OLE object embedding, specifically related to CVE-2017-8570. The document body includes a lure instructing the user to 'Enable Editing to view the document', a common tactic to bypass macro security. The exploitation of CVE-2017-8570 suggests the dropping and execution of a script, likely a second-stage payload.
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 4 \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 4
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
objdata_00_off00000bac.bina27e953ab98115fc11ddf7f3edf65dc4767fa45c5a2e7f733f69353ee7a5c774 |
rtf-objdata-decoded | RTF \objdata at offset 0xBAC | 79788 bytes |
objdata_01_off0000735b.bin87b8f9f8ab5d871ea947d81b1839019dd207f1b3a32f21e27e76dd93d13e3633 |
rtf-objdata-decoded | RTF \objdata at offset 0x735B | 79761 bytes |
objdata_02_off0002fc0a.bina8e170497da15decc11753d202c99c86f7a7ffd2d52481e6b9c79a5403675379 |
rtf-objdata-decoded | RTF \objdata at offset 0x2FC0A | 2632 bytes |
objdata_03_off000311ad.bine8d4fe950caed6dcfde26f4b616825bbe11b93458425974b7d075167f675abf7 |
rtf-objdata-decoded | RTF \objdata at offset 0x311AD | 12297 bytes |
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