Malicious RTF — malware analysis report

Static analysis result for SHA-256 42378db341f0c7c7…

MALICIOUS

RTF

66.5 KB
MD5: 8bcf57058606acbe4f2ff5090b35ba39 SHA-1: 2fdf27f17545d2b278865fce24d93aa4544b020b SHA-256: 42378db341f0c7c7f83113754d92f5b9bb2e19088716176f9295d672631513f1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF document contains an embedded OLE object that triggers a known vulnerability in Microsoft Equation Editor (CVE-2017-11882). This vulnerability allows for arbitrary code execution when the object is processed. No document body or scripts were extracted, but the presence of the Equation Editor exploit is a strong indicator of malicious intent.

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.
  • 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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00000119.bin
9885f761bd326f645c69b153b28d5e002968ba396a193134b3dc90f7f2d7b202		 rtf-objdata-decoded RTF \objdata at offset 0x119 3631 bytes

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