Malicious RTF — malware analysis report

Static analysis result for SHA-256 c8882719de7313ea…

MALICIOUS

RTF

99.6 KB Created: 2021-07-16 07:42:00
MD5: a243dc8ddeb209ba682fcf44292da391 SHA-1: 2b55dc2225539d1cd0b49393e2e2976e9bfe78d9 SHA-256: c8882719de7313ea19474973d35d227b7340fb985cf55b5811d8fea5560b1205
102 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF file contains an embedded OLE object that triggers a critical vulnerability, CVE-2017-11882, related to Microsoft Equation Editor. This exploit allows for the execution of arbitrary code on the victim's machine. No document body or scripts were extracted, but the presence of this critical vulnerability is sufficient evidence of malicious intent.

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_off000030ce.bin
0109f29ba73d8a06ba5b0763ff15e485d8a02093d47d8d94baa960f825669f10		 rtf-objdata-decoded RTF \objdata at offset 0x30CE 3631 bytes

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