Malicious RTF — malware analysis report

Static analysis result for SHA-256 d473ee0a329c5816…

MALICIOUS

RTF

271.8 KB Created: 2021-02-12 04:30:00
MD5: e819e4230b521edc33b2ee3273a9b8bf SHA-1: 08f8d506748195de80bb8430383570cd5fb4bc6c SHA-256: d473ee0a329c5816a3187cc36817ba718e0269fd46fbe675d0c540759fb1042a
102 Risk Score

Malware Insights

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

The RTF file contains embedded OLE object data and triggers a critical heuristic for CVE-2017-11882, indicating exploitation of the Equation Editor vulnerability. This vulnerability allows for arbitrary code execution, which is commonly used to download and run further malicious content. The document body content appears to be a lure related to Afghan refugees, which is likely a pretext for the malicious payload.

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
0109f29ba73d8a06ba5b0763ff15e485d8a02093d47d8d94baa960f825669f10		 rtf-objdata-decoded RTF \objdata at offset 0x1BC4 3631 bytes

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