Malicious RTF — malware analysis report

Static analysis result for SHA-256 2d1b4ea313cce0ee…

MALICIOUS

RTF

9.2 KB First seen: 2019-05-16
MD5: 9b0927551ae7f08e4a2db49a81e16bff SHA-1: 1e48b32548770d0964c3178deb856e5bffb4413c SHA-256: 2d1b4ea313cce0ee490defa7944fd5c2d354a954c8666971784784f7db2fd432
180 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 and OLE object activation. ClamAV detection confirms this is a known exploit targeting CVE-2017-11882, which allows for arbitrary code execution.

Heuristics 4

  • 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
  • \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_off0000003c.bin rtf-objdata-decoded RTF \objdata at offset 0x3C 4655 bytes
SHA-256: e258129f2918c1f3c6ae5b72ade3df9f812272917d78e2f86281f131e8a022a7

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