RTF malware analysis — malicious · b97fce0f28efb052

MALICIOUS

RTF

227.2 KB

MD5: 935a83880e7fde3c12de61af1b835086 SHA-1: 9113a59c4cd8f6a677ffe704ff010d40a7ea5bcf SHA-256: b97fce0f28efb0522a9236ece9fea2af1348157de7466ae457fc0de942d3628f

180 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.005 Visual Basic T1204.002 Malicious File

The RTF document contains multiple OLE objects, with one being automatically linked and triggered for update. This technique is commonly used to execute embedded malicious content, bypassing user interaction for macro execution. The 'SE_ENABLE_LURE' heuristic indicates the document likely contains instructions to enable content, further supporting its role as a dropper. No specific family could be identified, and no direct IOCs like URLs or hashes were extracted from the embedded objects.

Heuristics 6

Composite Moniker in RTF OLE object high CVE related RTF_COMPOSITE_MONIKER_RELATED

RTF 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.
Automatically linked OLE object high RTF_OBJAUTLINK

RTF contains \objautlink — an automatically linked OLE object surface that can be updated or activated when Word opens the document.
\objupdate forces OLE activation high RTF_OBJUPDATE

RTF contains \objupdate — forces automatic OLE object instantiation when the document is opened, bypassing user interaction. Almost exclusively seen in Equation Editor exploit documents.
OLE object data medium RTF_OBJDATA

RTF contains 3 \objdata section(s) — embedded OLE objects
Embedded OLE object medium RTF_OBJEMB

RTF contains \objemb — embedded OLE object
Macro/content-enable lure medium SE_ENABLE_LURE

Document 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.bin` `cc09bb9d1d5f8993d0869c8b4af7c8d576bf660c3fd15ee9fd9e7b2a072e2291`	rtf-objdata-decoded	RTF \objdata at offset 0x965	19617 bytes
`objdata_01_off0000a968.bin` `18cff8ef194415d33763880bf64011d23305e4b9143b76244b89e1c53b70a0d5`	rtf-objdata-decoded	RTF \objdata at offset 0xA968	2632 bytes
`objdata_02_off0000bf0b.bin` `44deae4627fee3c44f54d5bd10477ec2e17f4c08135f08e2417832e36d10d037`	rtf-objdata-decoded	RTF \objdata at offset 0xBF0B	12297 bytes

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