Malicious RTF — malware analysis report

Static analysis result for SHA-256 485ffc13cd34329f…

MALICIOUS

RTF

76.9 KB Created: 2019-01-23 19:55:00 First seen: 2020-05-25
MD5: 9424cb8296f7d76943ec309aeb6541ee SHA-1: da1156d5e5b4e3d251b011fb271a8bc192f01708 SHA-256: 485ffc13cd34329f796942acb290ed03f5b32e54e33420f9156a237fc99856bd
182 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The RTF file contains an OLE object that triggers CVE-2017-8759, indicating exploitation for client execution. The embedded artifact, objdata_00_off00010a3c.bin, along with heuristic firings related to shellcode, suggests the file is designed to download and execute a secondary payload. The presence of a suspicious URL further supports this conclusion.

Heuristics 5

  • 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.
  • Suspicious extracted artifact critical EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • \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 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://bit.ly/2VL0wCZIn RTF body

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00010a3c.bin rtf-objdata-decoded RTF \objdata at offset 0x10A3C 1262 bytes
SHA-256: 92394bf1ca7f9c9dca303f2643b6724737028c19a29eeeef56085ddab446b35e
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Static shellcode analysis recovered URL(s): https://bit.ly/2VL0wCZ Static shellcode analysis found candidate code region(s). Indicators: SC_STR_LOADLIBRARY, SC_STR_URLDOWNLOAD, SC_PEB_ACCESS Static shellcode analysis recovered API/import strings: LoadLibraryA, GetProcAddress, URLDownloadToFileA, CreateProcessA, ExitProcess

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