Malicious RTF — malware analysis report

Static analysis result for SHA-256 c475ff6fd80823c8…

MALICIOUS

RTF

9.9 KB First seen: 2019-05-16
MD5: 37728ad566f26ac6a80669815c5efb26 SHA-1: c894aa407b97c0a9bcf003041c0cec26d739291a SHA-256: c475ff6fd80823c81d4d2bf90018ba7a7300a97b9403287798ee4b50d3f410ce
182 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 exploits, including a critical ClamAV detection for Rtf.Exploit.CVE_2017_11882-6584355-1. This indicates the file is designed to exploit the CVE-2017-11882 vulnerability, allowing for arbitrary code execution on the victim's machine.

Heuristics 5

  • 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: 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
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://schemas.microsoft.com/office/word/2003/wordml In RTF body
    • http://bit.ly/2EOwyuLIn RTF body

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off000005e8.bin rtf-objdata-decoded RTF \objdata at offset 0x5E8 3618 bytes
SHA-256: 34f537b65530368a9e024a8f55949d19d0ebec2865a85f72d0f50cbbd269cf14