Malicious RTF — malware analysis report

Static analysis result for SHA-256 49a839dd32cde398…

MALICIOUS

RTF

183.2 KB Created: 2007-08-24 16:44:00 First seen: 2019-05-10
MD5: a013585752afc2a3bc49ac65728fd907 SHA-1: c51cf2449879734c1b5a7bc959c84605fa8092e4 SHA-256: 49a839dd32cde398c6b6c6c96416ebba9d397de96d2c52a2342c22c42dff7b9e
282 Risk Score

Malware Insights

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

The RTF document exploits CVE-2017-0199 and CVE-2017-8570, which are known vulnerabilities for dropping and executing malicious files. The embedded URL points to an Excel file, suggesting a lure to trick the user into opening a malicious spreadsheet. The document body itself appears to be a legitimate Standard Operating Procedure, likely used as a decoy.

Heuristics 7

  • Composite Moniker — CVE-2017-8570 (drops SCT script) critical CVE related CVE_2017_8570
    RTF \objdata decodes to OLE data containing the Composite Moniker — CVE-2017-8570 (drops SCT script) CLSID — the vulnerable control/moniker is embedded directly in the document's object stream, the delivery shape of this exploit. RTF objects auto-render when Word opens the file.
  • 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.
  • Composite Moniker in RTF OLE object high CVE related RTF_COMPOSITE_MONIKER_RELATED
    RTF contains Composite Moniker CLSID in OLE object context, but no nearby scriptlet/SCT payload was confirmed. Treat as related moniker attack-surface evidence rather than proof of CVE-2017-8570 exploitation.
  • 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://sp3.analyticagroup.com.sp009.alentus.com/QA/Excel%20Information%20Lists/SOP%20LIST.xls 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_off0001bad5.bin rtf-objdata-decoded RTF \objdata at offset 0x1BAD5 6185 bytes
SHA-256: 55952a1e76921bea9764208f563671545e09dc3750d50b9ea37404adec6fa7fe

Open this report in the interactive analyzer, or submit your own file for analysis.