Malicious RTF — malware analysis report

Static analysis result for SHA-256 cd5713b2e14c9bde…

MALICIOUS

RTF

36.4 KB
MD5: db292e40abe6c68ba773c6be0e548e63 SHA-1: 2a24cfe6cbd4ba32075419c189d41ac06da42927 SHA-256: cd5713b2e14c9bdeded058c5de2c14dbac6cf5674d311493a038b3e07945041c
220 Risk Score

Malware Insights

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

The RTF document contains an embedded OLE object, specifically targeting the Equation Editor, which is known to be vulnerable to CVE-2017-8759. The ".objupdate" directive forces OLE activation, leading to exploitation. The document also contains a lure instructing the user to 'enable editing', indicating a malicious intent to bypass security measures and execute code.

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.
  • Equation Editor CLSID critical RTF_EQUATION_EDITOR
    Equation Editor OLE CLSID found inside an OLE object — exploited by CVE-2017-11882 / CVE-2018-0802 / CVE-2018-0798
  • \objupdate forces OLE activation high RTF_OBJUPDATE
    RTF contains \objupdate — forces automatic OLE object instantiation when the document is opened, bypassing user interaction. Almost exclusively seen in Equation Editor exploit documents.
  • OLE object data medium RTF_OBJDATA
    RTF contains 1 \objdata section(s) — embedded OLE objects
  • Embedded OLE object medium RTF_OBJEMB
    RTF contains \objemb — embedded OLE object
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off0000023f.bin
72ba8347f6764b21ffcafa003cb1312c37907c5fd2d7780efb17db1a53db789d		 rtf-objdata-decoded RTF \objdata at offset 0x23F 2423 bytes

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