Malicious RTF — malware analysis report

Static analysis result for SHA-256 2d081e05e122a2f5…

MALICIOUS

RTF

323.8 KB Created: 2021-02-12 04:30:00
MD5: 3c6f14d2fffa1c51bd6c23c8805a3204 SHA-1: bb9c04bf1c77d7d7ca349e89002eebbd17800750 SHA-256: 2d081e05e122a2f548f05f560b440d8c58a258d5137bbd8a9c7f2656a9be25f9
102 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The sample is an RTF document that contains an embedded OLE object, 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 user's system. The document body content appears benign, suggesting the exploit is the primary malicious mechanism.

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_off00000122.bin
09594ea5fa8e32f39f9d88fdffe326e25a86d9c3fae1d8c94429bf9690f6ba96		 rtf-objdata-decoded RTF \objdata at offset 0x122 3629 bytes

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