Malicious RTF — malware analysis report

Static analysis result for SHA-256 903b7cd584081bf2…

MALICIOUS

RTF

9.4 KB
MD5: 98db71a0a3d57532a479809003253792 SHA-1: 984665ff0c3e8138ea981bd7884f05710a676f22 SHA-256: 903b7cd584081bf2cd5a79235c5b983a2d086e3cf0a04959113a15bead769acb
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The file is an RTF document containing an embedded OLE object, specifically targeting a vulnerability in the Equation Editor (CVE-2018-0802). This exploit is designed to execute arbitrary code upon opening the document, likely as a delivery mechanism for further malicious activity. The ClamAV detection further confirms the malicious nature of the file.

Heuristics 4

  • 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
  • ClamAV: Rtf.Exploit.CVE_2018_0802-6825822-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Rtf.Exploit.CVE_2018_0802-6825822-0
  • \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.

FilenameKindSourceSize
objdata_00_off00000076.bin
5672299961daba2014172d6d8dec26d3866d1782464c357c9c367f240f411a04		 rtf-objdata-decoded RTF \objdata at offset 0x76 4677 bytes

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