Malicious RTF — malware analysis report

Static analysis result for SHA-256 5501649de1298eae…

MALICIOUS

RTF

8.1 KB First seen: 2019-01-11
MD5: f5d2833069f17106a7f077eaf3c2cf39 SHA-1: da64606640f1ac6bb3eb1f7e484c1ddec2ddf1b7 SHA-256: 5501649de1298eae072c08eb26f59f940eef2a4fbb235635fcd95f8538869fc4
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 activation. ClamAV detection confirms this is a known exploit targeting CVE-2017-11882, which is typically used for arbitrary code execution. No scripts were extracted, and the document body was truncated, limiting further analysis of the exploit's specific payload.

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 4135 bytes
SHA-256: 007c20f6c951bbcb912e46cf3c85e8b6246478fc4e3a9a667e1ce125a9ce8ea0

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