Malicious RTF — malware analysis report

Static analysis result for SHA-256 1e4871298e9f8df8…

MALICIOUS

RTF

8.2 KB First seen: 2020-02-04
MD5: d08904c27129021e68a8317563a310b2 SHA-1: 1db7e2f00b601fd1c905a178742068a029be982f SHA-256: 1e4871298e9f8df8cb7ebfee464fd4ca2cd17dad99cac5dc55ca04d936fa6887
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 exploitation. ClamAV detection confirms this is a known exploit for CVE-2017-11882, which allows for arbitrary code execution. The file's purpose is to exploit this vulnerability.

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_off0000003b.bin rtf-objdata-decoded RTF \objdata at offset 0x3B 4159 bytes
SHA-256: b824adf6ef9dfa57bc3b10f47f97790aaba7cc7155db25b667aec29bbbc52a88

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