RTF malware analysis — malicious · 4e8ee722d77c46da

MALICIOUS

RTF

8.4 KB Authoring application: Riched20 6.3.9600

MD5: 74256a1dc714ca99d0f3b0c2ce00d623 SHA-1: 4e9e1fbb3004c2375ba2df102bf09abe296a94ce SHA-256: 4e8ee722d77c46da729306c1a549b61bd07ea4c2ea0f75d842c32667ccb7d4fa

260 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution

The RTF file contains an embedded OLE object specifically identified as Equation Editor, triggering critical heuristics for CVE-2017-11882. This indicates the file is designed to exploit this known vulnerability for arbitrary code execution. The ClamAV detection further confirms the malicious nature, classifying it as Rtf.Exploit.CVE_2017_11882-6584355-1.

Heuristics 6

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
Equation Editor object class critical RTF_OBJCLASS_EQUATION

Object class 'equation.3' references Equation Editor
ClamAV: Rtf.Exploit.CVE_2017_11882-6584355-1 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Rtf.Exploit.CVE_2017_11882-6584355-1
\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
Embedded OLE object medium RTF_OBJEMB

RTF contains \objemb — embedded OLE object

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off00000100.bin` `5440656afb2497d48558e558c66155572b610aafc5ff9393462091273be7f8d3`	rtf-objdata-decoded	RTF \objdata at offset 0x100	3546 bytes

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