Malicious RTF — malware analysis report

Static analysis result for SHA-256 9a1abc8ed600e5de…

MALICIOUS

RTF

87.0 KB
MD5: a5f3b3c4e26d080875f245f1657affe4 SHA-1: 825ba2f33c5f7ed6b5982f66dea6ee2d108dbf46 SHA-256: 9a1abc8ed600e5dec3a4358ac6866a33a75ab5af4c1875a1d475e28991d97c95
100 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The sample is an RTF document containing an embedded OLE object. Static analysis identified a critical heuristic firing for CVE-2017-11882, indicating an exploit targeting a known vulnerability in the Equation Editor. This vulnerability is typically leveraged to execute arbitrary code, suggesting the document's primary purpose is to exploit this flaw for initial code execution.

Heuristics 3

  • 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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off0000237f.bin
4eb800f8b5fde6c58e6af2643466289140ab4162afcd360ed5f859b1b1ab4914		 rtf-objdata-decoded RTF \objdata at offset 0x237F 15974 bytes

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