Malicious RTF — malware analysis report

Static analysis result for SHA-256 2ddd5036b47c88a2…

MALICIOUS

RTF

103.1 KB Created: 2021-07-16 07:42:00
MD5: 3b075efa877b219bcc873c9d5a300f35 SHA-1: 727b70a7b67b375c895e04c74711604e2bb44cdf SHA-256: 2ddd5036b47c88a2252de68f5e046c4149aad13ecafb1ace24da75a052f62e05
102 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF file contains an embedded OLE object that triggers a buffer overflow vulnerability in Microsoft Equation Editor (CVE-2017-11882). This vulnerability allows for the execution of arbitrary code, likely to download and run a secondary payload. No specific family could be identified from the available evidence.

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_off00003265.bin
ca85a1e33d3601dc5e3b21609fe9841ca2df74a3a92f768f8180556e710b133c		 rtf-objdata-decoded RTF \objdata at offset 0x3265 3631 bytes

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