Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 d620f5fe1c8f38d2…

MALICIOUS

RTF / .DOC

14.2 KB
MD5: 57dfb60c356c6be05b208ea0b22f35b4 SHA-1: 4707e9418789c1e53c8ce769349d9823404a5ce9 SHA-256: d620f5fe1c8f38d2b3ba48f6828a0e9eb665dc25b76847c8f8c98304205588a0
220 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1068 Commonly Used Port

The sample is an RTF document that triggers CVE-2017-11882 via an embedded Equation Editor object. This is confirmed by the critical ClamAV detection and the presence of RTF_EQUATION_EDITOR and RTF_OBJAUTLINK heuristics. No scripts were extracted from this sample, but the exploit's purpose is typically to achieve remote code execution on the target system.

Heuristics 5

  • 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
  • Automatically linked OLE object high RTF_OBJAUTLINK
    RTF contains \objautlink — an automatically linked OLE object surface that can be updated or activated when Word opens the document.
  • \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 2 \objdata section(s) — embedded OLE objects

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off000014ac.bin
4d338f847b6067d3f39b0708f77be958067d48d6c5f0ce15d0249e81c615707b
rtf-objdata-decoded RTF \objdata at offset 0x14AC 4183 bytes