RTF malware analysis — malicious · 4d93f2c905c4bd34

MALICIOUS

RTF

26.7 KB

MD5: 4da8c38808017d5f01ba220a5e02944a SHA-1: 84df8f6fe52cd80df820c279710648ed9e9d81f7 SHA-256: 4d93f2c905c4bd34bbe79e8cf8e8eba3c8cc3078335ba9eb31551c3b0ba24e01

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious File T1059.003 Windows Command Shell

The RTF file contains embedded OLE object data, specifically triggering heuristics related to Equation Editor vulnerabilities and OLE object activation. This strongly suggests the file is designed to exploit a known vulnerability in the Equation Editor component to achieve arbitrary code execution upon opening. No document body or scripts were extracted, but the critical heuristic firings are sufficient to infer the attack vector.

Heuristics 4

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.
Equation Editor CLSID critical RTF_EQUATION_EDITOR

Equation Editor OLE CLSID found inside an OLE object — exploited by CVE-2017-11882 / CVE-2018-0802 / CVE-2018-0798
\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 2 \objdata section(s) — embedded OLE objects

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off00001f5e.bin` `fbed20e6e50b9465b5f53c7e763c6fb75651572d185b496ab9620546935992eb`	rtf-objdata-decoded	RTF \objdata at offset 0x1F5E	4164 bytes

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