Malicious RTF — malware analysis report

Static analysis result for SHA-256 7ebcdb7bd2fb199c…

MALICIOUS

RTF

554.6 KB Created: 2017-12-05 02:18:00 First seen: 2018-01-23
MD5: f6217dcc2188d54acaf9cb8d83922806 SHA-1: 4fce35ecedcfe2f4680b1312db68e9fb3d45f39e SHA-256: 7ebcdb7bd2fb199c9add373b8a58dc310d025c58467f60d8a66c08922a3b792e
162 Risk Score

Malware Insights

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

The RTF document contains multiple embedded OLE objects and triggers the CVE-2017-8759 vulnerability, which is known for allowing arbitrary code execution. This indicates an exploit attempt, likely delivered via spearphishing, to compromise the user's system.

Heuristics 5

  • CVE-2017-8759 — MSXML SAX OLE activation critical CVE likely CVE_2017_8759
    RTF contains a hex-encoded OLE1 object for Msxml2.SAXXMLReader.6.0 followed by an embedded OLE compound document, and the document requests OLE activation. This matches the RTF staging shape used for CVE-2017-8759 SOAP/WSDL parser code injection.
  • ClamAV: Doc.Exploit.DDEautoexec-6346603-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Exploit.DDEautoexec-6346603-1
  • OLE object data medium RTF_OBJDATA
    RTF contains 10 \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 In RTF body

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off000035b4.bin rtf-objdata-decoded RTF \objdata at offset 0x35B4 22577 bytes
SHA-256: 14607630e22c0ebf4aef6c08d04e514c96f07258cbb401d0a5891f1dc37b2d41
objdata_09_off000760a0.bin rtf-objdata-decoded RTF \objdata at offset 0x760A0 22577 bytes
SHA-256: e2b16eeb2785b9fc6975f61a78da20e57c687f02c5b057ac5769e9783affcbc5

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