Malicious RTF — malware analysis report

Static analysis result for SHA-256 4ef756b7e459ff2c…

MALICIOUS

RTF

43.8 KB Created: 2017-08-23 01:31:00 First seen: 2017-08-27
MD5: 4238454953923f1d4afa21346a4ef2d5 SHA-1: b9719d5845903bc2000a4e98284410f690b2cf61 SHA-256: 4ef756b7e459ff2c2c793d632aedd27db03705ed3bd6c36db23533dfc0c8b18d
182 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, a known vulnerability for remote code execution. The exploit targets the URL https://www.baidu.com/ to download and execute a secondary payload. This indicates a malicious document designed to compromise the user's system.

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://schemas.microsoft.com/office/word/2003/wordml In RTF body
    • https://www.baidu.com/In RTF body

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00002ae0.bin rtf-objdata-decoded RTF \objdata at offset 0x2AE0 3924 bytes
SHA-256: 88b1e294beec0fad6104879323024ba3be5c98f2eec6a552302ed6cb1e24d449

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