Malicious RTF — malware analysis report

Static analysis result for SHA-256 301daff84c6a3d61…

MALICIOUS

RTF

100.6 KB Created: 2021-07-16 07:42:00
MD5: b69b17ebf5d80bf21a955f36c2279cfd SHA-1: 0e61531f9188f52363a9aed0b4c6c068dbc75e9d SHA-256: 301daff84c6a3d61561c94c4822273857b6ac6fc744067a46f05cbf87424f373
102 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF file contains an embedded OLE object that triggers a buffer overflow vulnerability in the Equation Editor (CVE-2017-11882). This vulnerability allows for the execution of arbitrary code, likely to download and run a secondary payload. The embedded URL is benign and likely a decoy.

Heuristics 4

  • CVE-2017-11882 — Equation Editor FONT record overflow critical CVE likely CVE_2017_11882
    Equation Editor MTEF contains an overlong FONT typeface field, the vulnerable copy primitive for CVE-2017-11882. This is stronger evidence than the Equation Editor CLSID alone because it identifies the malformed record that drives code execution in EQNEDT32.EXE.
  • OLE object data medium RTF_OBJDATA
    RTF contains 1 \objdata section(s) — embedded OLE objects
  • Embedded OLE object medium RTF_OBJEMB
    RTF contains \objemb — embedded OLE object
  • 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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00003291.bin
f54402d80540d8e6025effe16fd5a4ac693fed2cdfa5463743d488b477f6f25b		 rtf-objdata-decoded RTF \objdata at offset 0x3291 3629 bytes

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