Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 eda4fa821b5bc4bc…

MALICIOUS

RTF / .DOC

10.2 KB
MD5: 1756ce027d1cf5efe3a65ee1e05dd368 SHA-1: c66b6245ba62fe1c1a61ea035dc23ce8184243c8 SHA-256: eda4fa821b5bc4bc9c71b08ead48306df19654f1b6afb90c706216a883c9cc28
180 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.001 PowerShell

The file is an RTF document containing embedded OLE object data, specifically triggering heuristics related to the Equation Editor vulnerability (CVE-2017-11882). This vulnerability is known to allow for arbitrary code execution. The ClamAV detection name directly confirms this exploit. The embedded OLE object data is likely used to deliver and execute a malicious payload.

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_2017_11882-6584355-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Rtf.Exploit.CVE_2017_11882-6584355-1
  • \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_off0000077d.bin
3fac84a36c3fa03bb96481bcb6ff8a185949097232e5fcc24a23ee0a48b816b3
rtf-objdata-decoded RTF \objdata at offset 0x77D 4173 bytes