Malicious RTF — malware analysis report

Static analysis result for SHA-256 09d328de63eafe94…

MALICIOUS

RTF

113.2 KB Created: 2021-07-16 07:42:00
MD5: c8f758778d1e85db66aaefb41c3fa349 SHA-1: 5b8b59e8d66b2a6490503aa44e9afdfefe30c697 SHA-256: 09d328de63eafe94519d1d46831fcc6610d41f7387d8d2971fbe3a3a190e253a
142 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF file contains an embedded OLE object that triggers the CVE-2017-11882 vulnerability in Microsoft Equation Editor. This vulnerability allows for the execution of arbitrary code, indicating a likely exploit attempt. No specific malware family could be identified from the available evidence.

Heuristics 5

  • 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.
  • Composite Moniker in RTF OLE object high CVE related RTF_COMPOSITE_MONIKER_RELATED
    RTF contains Composite Moniker CLSID in OLE object context, but no nearby scriptlet/SCT payload was confirmed. Treat as related moniker attack-surface evidence rather than proof of CVE-2017-8570 exploitation.
  • 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_off00003306.bin
08eec9b9f828015a11c6160a1adc77e415982ba41a7feb74e084c6d5d9dd58f6		 rtf-objdata-decoded RTF \objdata at offset 0x3306 3629 bytes

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