Malicious RTF — malware analysis report

Static analysis result for SHA-256 df22408833b2ae58…

MALICIOUS

RTF

771.8 KB Created: 2017-07-06 16:14:00 First seen: 2019-05-10
MD5: 9217e861d8d2f9c727d79c82a17341e8 SHA-1: 707cdc64b0c1e1924d3762c14fb1d59104ad4cee SHA-256: df22408833b2ae58f0d3e2fe87581be31972ef56e0ebf5efafc4e6e0341b5521
202 Risk Score

Malware Insights

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

The RTF file contains embedded OLE objects, specifically a package object, which is a strong indicator of malicious intent. The critical heuristic firing for CVE-2017-8759 confirms that the file exploits this vulnerability for client execution. The ClamAV detection further supports the malicious classification. The embedded URL is benign and likely a red herring.

Heuristics 6

  • 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: Win.Phishing.Suspicious-6355521-4 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Phishing.Suspicious-6355521-4
  • Package object class high RTF_OBJCLASS_PACKAGE
    OLE Package object — can wrap arbitrary files
  • OLE object data medium RTF_OBJDATA
    RTF contains 2 \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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off000a6325.bin rtf-objdata-decoded RTF \objdata at offset 0xA6325 12456 bytes
SHA-256: 3f2192fe41c50761d57b4980f720ce977fff07bddfab840fa83f55e7704963f2

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