Malicious RTF — malware analysis report

Static analysis result for SHA-256 3831aada2b9d51a1…

MALICIOUS

RTF

50.1 KB Created: 2018-03-14 18:45:00 First seen: 2019-05-10
MD5: 4a34a482bf3b70cc333b4308c7a54ee2 SHA-1: 2b7a62e30820fdf7fcd8a44db376fd70473e8524 SHA-256: 3831aada2b9d51a1f00faa9f5173b6d635ca801d04136fbdb30b849833e1e7b8
142 Risk Score

Malware Insights

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

The RTF file contains an OLE object that leverages CVE-2017-0199 to fetch a remote resource. The embedded URL points to a resource that is likely the second-stage payload. The file is classified as malicious due to this exploit.

Heuristics 5

  • 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.
  • 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://void.cat/3a95604cfa65dd05f7d7d9feb6f6ad0d0ae36e0d In RTF body
    • http://schemas.microsoft.com/office/word/2003/wordmlIn RTF body

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00002a15.bin rtf-objdata-decoded RTF \objdata at offset 0x2A15 5808 bytes
SHA-256: f4609e7b5906ec8855ef3526c4e184bb6f6cc7599bf75c352e15009242dab64d

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