Malicious RTF — malware analysis report

Static analysis result for SHA-256 4a1cf6bbb7a6ee0f…

MALICIOUS

RTF

53.1 KB
MD5: f41ddfed5cca08174cdd358a9fb379d5 SHA-1: 28f7cd7378f58bca5b18978219a0641dd784fbd3 SHA-256: 4a1cf6bbb7a6ee0fca042990aa163d74e62ec78148ff50452a46444987068ca9
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, CVE-2017-11882, within Microsoft Equation Editor. This vulnerability allows for the execution of arbitrary code, indicating a likely exploit delivery mechanism. No specific malware 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.
  • 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_off0000010f.bin
b723f073f91bf1aef8165d8524a7fa833f06aab1f4d6c5647ab146249b7b4936		 rtf-objdata-decoded RTF \objdata at offset 0x10F 3631 bytes

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