Xls.Malware.Sdrop-10036532-0 — RTF malware analysis

Static analysis result for SHA-256 9a24dddead78f739…

MALICIOUS

RTF

2.20 MB Created: 2019-12-20 17:39:00 First seen: 2020-08-25
MD5: 70fa45b9d1200236e410bb985b28c3bb SHA-1: b092bac19da22047afbcc8aa8608103906ca3e2d SHA-256: 9a24dddead78f739aa5e415c14e76dbbd6f232fe822d8579d9d06f78af9c001a
262 Risk Score

Malware Insights

Xls.Malware.Sdrop-10036532-0 · confidence 95%

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

The RTF file contains multiple OLE objects, with a critical finding of CVE-2017-8759, indicating exploitation for client execution. The presence of excessive hex-encoded data within OLE objects suggests a hidden payload. ClamAV identified the sample as Xls.Malware.Sdrop-10036532-0, a known malware dropper. The embedded URL, though unrecognized, is a potential indicator of a command and control server or download location.

Heuristics 8

  • 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: Xls.Malware.Sdrop-10036532-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Malware.Sdrop-10036532-0
  • \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.
  • Large hex data blocks in OLE object high RTF_EXCESSIVE_HEX
    RTF contains ~1002KB of hex-encoded data inside \objdata sections — may hide a payload
  • OLE object data medium RTF_OBJDATA
    RTF contains 9 \objdata section(s) — embedded OLE objects
  • Embedded OLE object medium RTF_OBJEMB
    RTF contains \objemb — embedded OLE object
  • OlePres presentation stream in RTF OLE object medium RTF_OLEPRES_STREAM
    RTF contains an embedded OLE object with an OlePres presentation stream. OlePres is an OLE presentation marker and is not enough on its own to identify CVE-2025-21298.
  • 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.c In RTF body

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00003139.bin rtf-objdata-decoded RTF \objdata at offset 0x3139 119854 bytes
SHA-256: 6d01f83d788a2878fc0512017d509a18f4b5b89aecd130fe039d49c1e6fd1dce

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