RTF malware analysis — malicious · 6305efeeb6ce20a6

MALICIOUS

RTF

12.0 KB First seen: 2019-05-31

MD5: f959c3e0fcac843dec53312ce645b567 SHA-1: cef31453bd9bbe0acb38d459948457e86b66234d SHA-256: 6305efeeb6ce20a667e9620bd4c4cbc95a88a8b9ed1c85fb243993c5b8260f0d

220 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution

The RTF file contains embedded OLE object data and specifically triggers heuristics related to Equation Editor exploits. ClamAV detection confirms this is a known exploit targeting CVE-2017-11882, which allows for arbitrary code execution. The file's structure and heuristic firings strongly indicate exploitation of this vulnerability.

Heuristics 5

Equation Editor CLSID critical CVE likely RTF_EQUATION_EDITOR

Equation Editor OLE CLSID found inside an OLE object — exploited by CVE-2017-11882 / CVE-2018-0802 / CVE-2018-0798
ClamAV: Doc.Exploit.CVE_2017_11882-6934206-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Exploit.CVE_2017_11882-6934206-0
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_off0000003f.bin`	rtf-objdata-decoded	RTF \objdata at offset 0x3F	4787 bytes
SHA-256: `562938b3a658c88a83c23bf4c8abb50d96e78c92e617c9c6071f1a3229a6b3b8`

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