Malicious RTF — malware analysis report

Static analysis result for SHA-256 9e895b3e805bf48a…

MALICIOUS

RTF

106.1 KB First seen: 2021-09-16
MD5: e4f8c8abf89dfd120f1da51829c8174e SHA-1: 80fb736b4ea78d88823ef96cd55947b71ea484d6 SHA-256: 9e895b3e805bf48a11ea9c9afecf27d78e1f136a820471e3a11de571b789d4b8
100 Risk Score

Malware Insights

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

The RTF file contains an embedded OLE object that triggers the CVE-2017-11882 vulnerability in Microsoft Equation Editor. This vulnerability allows for arbitrary code execution, likely to download and run a secondary payload. The file is classified as malicious due to this exploit.

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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off0000008e.bin rtf-objdata-decoded RTF \objdata at offset 0x8E 3627 bytes
SHA-256: 5d2fede66a017b7e77d76299a823e2b47f173ae66ea06cc9778b34ad018bbb50

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