Malicious RTF — malware analysis report

Static analysis result for SHA-256 91f028b1ade885ba…

MALICIOUS

RTF

1.18 MB Created: 2017-07-19 05:25:00 First seen: 2019-09-30
MD5: 6adec78e874232722c3758bbbcb95829 SHA-1: 3faeade9956dfc46b15a50c6022541d92d8cf537 SHA-256: 91f028b1ade885bae2e0c6c3be2f3c3dc692830b45d4cf1a070a0bd159f1f676
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_off0011d15f.bin rtf-objdata-decoded RTF \objdata at offset 0x11D15F 2502 bytes
SHA-256: 9fa4b7ead61b362c29d839271bd2a00fcbc9e0f59cc700493adead379695a117

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