Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 69be8f132653cbf2…

MALICIOUS

RTF / .DOC

8.3 KB
MD5: 8400ced2c0060e02eca4d7644edf9915 SHA-1: 969f85a903dfc3a7d1e4837a8a1de61f5e00ae6d SHA-256: 69be8f132653cbf24375cd454c7a12e078047505ea818fdb8729b3300805dd9d
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 for the Equation Editor vulnerability (CVE-2017-11882). This exploit is known to allow for arbitrary code execution on the victim's machine. The presence of ".objupdate" further indicates an attempt to activate the embedded object, facilitating the exploit.

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_off00000042.bin
f959fff13512afa2e47308a59e92543fa790d954ef5b2abb458406328b42560e
rtf-objdata-decoded RTF \objdata at offset 0x42 4158 bytes