RTF malware analysis — malicious · 4fe0591d0c5bd1f2

MALICIOUS

RTF

27.6 KB First seen: 2023-06-08

MD5: 8f6f20b9800cc3739e08c986979fe886 SHA-1: 945fc5d51604afd6e92c84fac68e336680d37abc SHA-256: 4fe0591d0c5bd1f27e2a384aa171139b371847c545e9eae6e7bc6269a954a58b

100 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious File

The RTF file contains OLE object data and uses \objupdate to force OLE activation, indicating an attempt to exploit a vulnerability. The presence of \objdata sections and the Ole10Native stream are strong indicators of malicious OLE object embedding. While no specific script was extracted, the heuristics strongly suggest the RTF is designed to trigger an exploit when opened, likely leading to further malicious activity.

Heuristics 3

Ole10Native stream in RTF OLE object high CVE related RTF_OLE10NATIVE_STREAM

RTF 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.
\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_off00001aff.bin` `c509b78ea98d64b3d7c0988a96c549454b0096e7e1c0d4f3305c68ca3bd3ddde`	rtf-objdata-decoded	RTF \objdata at offset 0x1AFF	4197 bytes

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