Malicious RTF — malware analysis report

Static analysis result for SHA-256 60dfa243d65b00ed…

MALICIOUS

RTF

52.5 KB First seen: 2019-01-11
MD5: e12c4f1a219c8b3d83f3de265b947cf1 SHA-1: d1ef8ee6e9a240288f80404cc0ae506f9ef48c6b SHA-256: 60dfa243d65b00ed50be699e97121e52c096cb23178c88a022158634ecc2a1e9
120 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF file contains OLE object data and triggers an \objupdate event, which is a strong indicator of exploitation. ClamAV specifically identifies this file as Doc.Exploit.CVE_2017_11882-6934206-0, confirming the use of the Equation Editor vulnerability. The exploit allows for arbitrary code execution on the victim's machine.

Heuristics 3

  • 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_off0000003c.bin rtf-objdata-decoded RTF \objdata at offset 0x3C 4140 bytes
SHA-256: 0013039e1e8625813e70552761952662f6e6e3a0db3b345b0a5d431a24d93164

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