Malicious RTF — malware analysis report

Static analysis result for SHA-256 a3ec0455ac5daf92…

MALICIOUS

RTF

45.9 KB Created: 2018-12-17 12:50:00 First seen: 2019-02-26
MD5: 7806074af2b50f5ba42551a79d714f1d SHA-1: f6ad8699bab5d7db383d3d862fb50a89104b78e4 SHA-256: a3ec0455ac5daf9246eb6007b8f4f0fda6244f8c1f0c3dca3e6fd6c976e38c02
202 Risk Score

Malware Insights

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

The RTF file contains an OLE object that exploits CVE-2017-0199, a known vulnerability for remote code execution. The exploit targets the URL https://volafile.org/get/BvjA9i3Y9ZmrN/Invoicing.doc to download and execute a secondary payload, indicated by the ClamAV detection and heuristic firings.

Heuristics 6

  • CVE-2017-0199 (OLE2Link / remote URL Moniker) critical CVE likely CVE_2017_0199
    RTF contains a URL Moniker OLE link whose decoded target is remote. Office can fetch and process the response through the CVE-2017-0199 OLE2Link attack path, but the server-side content type is not proven statically.
  • ClamAV: Rtf.Exploit.CVE_2017_0199-6335035-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Rtf.Exploit.CVE_2017_0199-6335035-0
  • Automatically linked OLE object high RTF_OBJAUTLINK
    RTF contains \objautlink — an automatically linked OLE object surface that can be updated or activated when Word opens the document.
  • OLE object data medium RTF_OBJDATA
    RTF contains 1 \objdata section(s) — embedded OLE objects
  • OlePres presentation stream in RTF OLE object medium RTF_OLEPRES_STREAM
    RTF contains an embedded OLE object with an OlePres presentation stream. OlePres is an OLE presentation marker and is not enough on its own to identify CVE-2025-21298.
  • 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 https://volafile.org/get/BvjA9i3Y9ZmrN/Invoicing.doc In RTF body
    • http://schemas.microsoft.com/ofIn RTF body

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off000027a4.bin rtf-objdata-decoded RTF \objdata at offset 0x27A4 7980 bytes
SHA-256: 38f501a98ca0724202f90af1b5e6db833c2709176defa2c2e5f88af2195e062b

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