Malicious RTF — malware analysis report

Static analysis result for SHA-256 40f5c458ae4942b4…

MALICIOUS

RTF

91.3 KB Created: 2021-07-16 07:42:00
MD5: a948c7a44b4e967731ab174da6c703aa SHA-1: 328f9e4f930ddce2752d3b595ba1dc9e95602e67 SHA-256: 40f5c458ae4942b447e6ed90884d23bca20f82f7c21e84e9e905f9311ba000f5
102 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF file contains embedded OLE object data, specifically triggering the CVE-2017-11882 vulnerability in Microsoft Equation Editor. This exploit allows for arbitrary code execution, indicating a malicious intent to compromise the system.

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_off00002f19.bin
0109f29ba73d8a06ba5b0763ff15e485d8a02093d47d8d94baa960f825669f10		 rtf-objdata-decoded RTF \objdata at offset 0x2F19 3631 bytes

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