Malicious RTF — malware analysis report

Static analysis result for SHA-256 b8808307e795c01f…

MALICIOUS

RTF

228.1 KB Created: 2021-02-12 04:30:00 First seen: 2021-06-04
MD5: 7adda06bf68d81fe436158b6019d11fc SHA-1: 4784ddeb75075f3bb44701420536438ddb25a28c SHA-256: b8808307e795c01fdf4a0662a88e9fa72d36578cc6f8e2de80a920cde61117c8
222 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF file contains embedded OLE object data and specifically triggers the CVE-2017-11882 vulnerability via the Equation Editor component. This exploit allows for arbitrary code execution, indicating a malicious intent to compromise the user's system. No specific malware family could be identified from the available evidence.

Heuristics 6

  • 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.
  • ClamAV: Doc.Exploit.Cve_2017_11882-7570663-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Exploit.Cve_2017_11882-7570663-1
  • Equation Editor CLSID critical RTF_EQUATION_EDITOR
    Equation Editor OLE CLSID found inside an OLE object — exploited by CVE-2017-11882 / CVE-2018-0802 / CVE-2018-0798
  • 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 In RTF body

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00000e60.bin rtf-objdata-decoded RTF \objdata at offset 0xE60 3107 bytes
SHA-256: 787dd6fb8fd114706352ba60c80fa45912162d0b5ed837dd193651681bed004b

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