Malicious RTF — malware analysis report

Static analysis result for SHA-256 f0639e209e63bde2…

MALICIOUS

RTF

90.3 KB Created: 2021-07-16 07:42:00
MD5: 4a34e64d8c67dcb189220f22f4a3104d SHA-1: 9fee02a1a3833e2a202d763b77b5c8ae97537613 SHA-256: f0639e209e63bde205f6bed7283589618a014e37fa5a0c4943090074cef08b4a
102 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF file contains an embedded OLE object that triggers the CVE-2017-11882 vulnerability in Microsoft Equation Editor. This vulnerability allows for arbitrary code execution, indicating a malicious intent to compromise the system. No document body or scripts were extracted, but the critical heuristic firing is sufficient evidence of exploitation.

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_off000032ff.bin
bb2dcd103eacf5fdd3b193952beeb12a7a733e877da62b125e2f7ac473573de1		 rtf-objdata-decoded RTF \objdata at offset 0x32FF 3629 bytes

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