Malicious RTF — malware analysis report

Static analysis result for SHA-256 38fb1f8deb8e6cda…

MALICIOUS

RTF

9.2 KB First seen: 2019-04-17
MD5: 1820d008f976cf629a716dfb1c3dce37 SHA-1: e2c0e974f2fc11ae41d5cbbe67c3ba1aeb2171f3 SHA-256: 38fb1f8deb8e6cdaf8d4203ca0196b406a0f7505552b6ab576affc7e631ca8d4
180 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF file contains embedded OLE object data and triggers heuristics related to Equation Editor and OLE activation. ClamAV specifically identifies this as Doc.Exploit.CVE_2017_11882-6934206-0, indicating exploitation of the CVE-2017-11882 vulnerability. This vulnerability allows for arbitrary code execution when the embedded object is activated.

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 4655 bytes
SHA-256: 60d66b1d7ffbf5ffd7d026ab8e16259390545e2bf7ab3f922a46b281f4c163f8

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