RTF / .DOC malware analysis — malicious · 73bc1996842a2b9b

MALICIOUS

RTF / .DOC

55.2 KB First seen: 2023-02-01

MD5: 4b7aa837e88cd219bdb017dd927ef978 SHA-1: f6bfdf87b9acc4150f2dd875ad7802de36f3b9a4 SHA-256: 73bc1996842a2b9bc3d02bad78a3a6c7f168df28116bcf49e74d3e1fc022520d

140 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1059.005 Visual Basic

The file is an RTF document containing an embedded OLE object, specifically identified as an Equation Editor exploit. The document body includes a lure instructing the user to 'Enable editing' to view the content. This combination strongly suggests an attempt to exploit the Equation Editor vulnerability (CVE-2017-11882) to execute arbitrary code upon user interaction.

Heuristics 4

Split hex Equation Editor ProgID + OLE object critical RTF_EQUATION_EDITOR

RTF embeds the Equation.3 ProgID as hex bytes near OLE object activation and splits the byte stream with whitespace or an ignorable RTF group. This is an Equation Editor OLE activation surface commonly used by CVE-2017-11882 / CVE-2018-0802 exploit documents.
\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
Macro/content-enable lure medium SE_ENABLE_LURE

Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off00008af4.bin` `c8daa374a9f2922ab84c0b53d758debaa90588f2e215d1d2f360da1b2110bad8`	rtf-objdata-decoded	RTF \objdata at offset 0x8AF4	1986 bytes

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