Malicious RTF — malware analysis report

Static analysis result for SHA-256 14f20a87b0137f27…

MALICIOUS

RTF

100.5 KB Created: 2021-07-16 07:42:00
MD5: f062573eeadd6dc14cdd9048727dbbda SHA-1: 826670cdeeedcf6e69a0c7f71bd1fd0d014d8333 SHA-256: 14f20a87b0137f2736d155bb6a8e38e3c28fdae080392d88cadc12b180b50488
102 Risk Score

Malware Insights

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

The RTF document contains an embedded OLE object that triggers the CVE-2017-11882 vulnerability in the Equation Editor. This exploit allows for arbitrary code execution, indicating a malicious intent to compromise the user's system. The presence of the exploit and the malicious verdict strongly suggest this file is part of a targeted attack, likely delivered as a spearphishing attachment.

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_off000032c1.bin
61f27343f5e3aac1931cda600fc53d5fb877b8770b6bc75e81d857af66168db8		 rtf-objdata-decoded RTF \objdata at offset 0x32C1 3629 bytes

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