Malicious RTF — malware analysis report

Static analysis result for SHA-256 8903cea460a3aeeb…

MALICIOUS

RTF

271.5 KB Created: 2021-02-12 04:30:00
MD5: 9a5f059c0e395b644b18b02c357d66d6 SHA-1: 7024ca4256f6541ecd880f77e3acc9aba5cc11a0 SHA-256: 8903cea460a3aeeb83970e4053882683437fbde7882d2b19061675ef90b44056
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 exploits the CVE-2017-11882 vulnerability in Microsoft Equation Editor. This vulnerability allows for the execution of arbitrary code, likely to download and run a secondary payload. The document body content appears to be a lure related to Afghan refugees and high schools in Quetta, suggesting a targeted social engineering approach.

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_off00001bc4.bin
8b0165fc7b4681ecb550b962d2c7b10bb64c70a0b037728074fb1ffdbc215410		 rtf-objdata-decoded RTF \objdata at offset 0x1BC4 3621 bytes

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