Malicious RTF — malware analysis report

Static analysis result for SHA-256 41504daeb377a2df…

MALICIOUS

RTF

272.1 KB Created: 2021-02-12 04:30:00
MD5: a29e322d7a18df385ff06c036763c4b2 SHA-1: ba5c48a6679b7609a4fdb0dc007e1650124cebc6 SHA-256: 41504daeb377a2df9a59af27a1faa2cefc95d835e59a8c38c74a53a5a7b8fdd2
102 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF file contains embedded OLE object data and specifically triggers a critical heuristic for CVE-2017-11882, indicating exploitation of the Equation Editor vulnerability. This exploit is commonly used to achieve arbitrary code execution, which is then typically used to download and run a second-stage payload. No document body content was available to provide further context on the lure.

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_off00001e06.bin
0109f29ba73d8a06ba5b0763ff15e485d8a02093d47d8d94baa960f825669f10		 rtf-objdata-decoded RTF \objdata at offset 0x1E06 3631 bytes

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