RTF malware analysis — malicious · cbb34d4fc22afb62

MALICIOUS

RTF

12.4 KB

MD5: 7df44ffa2fec1c83472a30525be70a3c SHA-1: e3ef505d3d875f42dc083783eeff70bf2ab4bf4d SHA-256: cbb34d4fc22afb62ac911e7c4f23fbabefdd0da089bbd3718d7e7e7977c1a59f

120 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious File

The file is an RTF document containing OLE object data, specifically triggering critical heuristics for Equation Editor exploitation and OLE object activation. This indicates the document is designed to exploit a vulnerability, likely CVE-2017-11882, to execute code. The presence of an embedded URL suggests a downloader or droppper functionality, aiming to retrieve and execute a secondary payload. The exact nature of the payload is not discernible from the provided evidence.

Heuristics 3

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

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off00001f12.bin` `e78911849271c968012fe1b58a3e3ceb9ca3e83cf364c740623a25be46c799db`	rtf-objdata-decoded	RTF \objdata at offset 0x1F12	1715 bytes

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