Malicious RTF — malware analysis report

Static analysis result for SHA-256 def0ad84549a9d04…

MALICIOUS

RTF

47.1 KB Created: 2018-05-27 23:22:00 First seen: 2019-09-30
MD5: dd363215f48699225e2a4cb96105425b SHA-1: 4a2541babc16c1c9938a82a01221febc45119f19 SHA-256: def0ad84549a9d0439d9b05f440c694ea8a0d28aaa85f14a502c52f958838246
182 Risk Score

Malware Insights

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

The RTF file contains an OLE object with an automatically linked OLE object, which is a known indicator for CVE-2017-0199 exploitation. The embedded URL points to a remote resource that would likely host a second-stage payload. This technique is commonly used to deliver malware via email attachments.

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.
  • 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
  • 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://127.0.0.1/1.html In RTF body

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00002c2b.bin rtf-objdata-decoded RTF \objdata at offset 0x2C2B 2724 bytes
SHA-256: 2863241a835f552414ec53a4ff5507694a72c86293d9190f9790956a72db8b0a

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