RTF malware analysis — malicious · bff33f3b468dfa85

MALICIOUS

RTF

27.7 KB First seen: 2023-05-31

MD5: d9eca8a9237d39e32b892cacd27ac633 SHA-1: da6ba5172d51e213579d437cabdf5e05c6a085a4 SHA-256: bff33f3b468dfa85eb29f6d1335ceb67c54c5630dbc21d1261978f27cab57f45

100 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious File

The RTF document contains OLE object data that is automatically linked and updated, indicating an attempt to execute embedded content upon opening. The heuristics RTF_OBJAUTLINK and RTF_OBJUPDATE strongly suggest that this mechanism is used to trigger malicious code execution. While no specific scripts were extracted, the OLE object's presence and activation methods point towards a downloader or exploit delivery pattern.

Heuristics 3

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 1 \objdata section(s) — embedded OLE objects

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off00001c5b.bin` `ae34c2ddc7660fe85fc71793296a50b0b3d765bff48dcd862fdefddbc99950fc`	rtf-objdata-decoded	RTF \objdata at offset 0x1C5B	4171 bytes

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