Malicious Office (OLE) — malware analysis report

Heuristics 9

• CVE-2007-3899 — Microsoft Word malformed string memory corruption critical CVE likely CVE_2007_3899
  Word OLE document has the MS07-060 malformed-string exploit shape: a Word 97-family FIB points to a malformed DOP/string-table region with an abnormal INT_MAX run, inflated text counters, and exploit payload or Mdropper.Z campaign evidence.
• OLE with Ole10Native — possible CVE-2026-21514 exploitation high CVE likely CVE_2026_21514
  Document contains a Word OLE object with Ole10Native plus executable, PE, or risky remote-link indicators. CVE-2026-21514 exploits OLE metadata validation; this stronger structure is treated as likely exploitation.
• Embedded PE executable critical OLE_EMBEDDED_EXE
  MZ/PE header found inside document — possible embedded executable
• Ole10Native package drops an auto-executable payload critical OFFICE_PACKAGE_RISKY_FILE
  OLE Package displayName or fullPath ends in a directly auto-executable extension (a runnable binary or a script the default shell host runs on double-click). Embedding such a payload inside an Office document has no benign authoring use — it is a malware-delivery dropper.
• Reference to WinExec API high SC_STR_WINEXEC
  Reference to WinExec API
• Reference to LoadLibrary API high SC_STR_LOADLIBRARY
  Reference to LoadLibrary API
• Reference to GetProcAddress API high SC_STR_GETPROCADDRESS
  Reference to GetProcAddress API
• Reference to VirtualAlloc API medium SC_STR_VIRTUALALLOC
  Reference to VirtualAlloc API
• 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://www.mcu51.com/search.asp?txtitle=�� In document text (OLE body)

  • http://www.mcu51.com/product/google.asp?q=In document text (OLE body)
  • http://www.mcu51.comIn document text (OLE body)
  • http://www.mcu51.com/sscom.txtIn document text (OLE body)
  • http://www.mcu51.com/count/counternoview.aspIn document text (OLE body)
  • http://www.mcu51.com/bbs/find.aspIn document text (OLE body)
  • http://www.c51bbs.com/c51bbs/find.aspIn document text (OLE body)
  • http://www.laogubbs.com/In document text (OLE body)
  • http://www.21icbbs.comIn document text (OLE body)
  • http://www.mcu51.com/sscom.htmIn document text (OLE body)
  • http://www.mcu51.com/download/sscom.rarIn document text (OLE body)
  • http://www.netmastersllc.comIn document text (OLE body)
  • http://ns.adobe.com/xap/1.0/In document text (OLE body)
  • http://www.w3.org/1999/02/22-rdf-syntax-ns#In document text (OLE body)
  • http://ns.adobe.com/iX/1.0/In document text (OLE body)
  • http://ns.adobe.com/xap/1.0/mm/In document text (OLE body)
  • http://schemas.openxmlformats.org/drawingml/2006/mainIn document text (OLE body)

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