Malicious RTF — malware analysis report

Static analysis result for SHA-256 bfdfa0e4d5a6d7c9…

MALICIOUS

RTF

39.3 KB Created: 2017-08-24 14:59:00 First seen: 2017-08-27
MD5: b3a3d02a4a08fc313b333ac2fb585bb2 SHA-1: ec3966b9bd56f802022e9f6f3c11b515161e0d4e SHA-256: bfdfa0e4d5a6d7c935a161bb274f719effc7a5fc1efe5444fd5e9854bbe946b2
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. This exploit is designed to download and execute a remote HTA payload from the URL https://dev.null.vg/zD7Rw98j.hta. The presence of the weaponized URL and the specific CVE exploit strongly indicate malicious intent.

Heuristics 6

  • CVE-2017-0199 (OLE2Link / weaponized URL) critical CVE exact CVE_2017_0199_WEAPONIZED_URL
    RTF contains a URL Moniker OLE link to a script/HTA/template-style remote loader, matching the tighter static CVE-2017-0199 shape.
  • 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://dev.null.vg/zD7Rw98j.hta 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_off0000274e.bin rtf-objdata-decoded RTF \objdata at offset 0x274E 4664 bytes
SHA-256: 91d3e389808dd65c22c863ba6a401971f324904cf7adf931cf201569fe9fc4a0

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