Malicious Office (OLE) / .DOCX — malware analysis report

Static analysis result for SHA-256 022c2addc5453399…

MALICIOUS

Office (OLE) / .DOCX

864.0 KB Created: 2021-06-22 08:00:00 Authoring application: Microsoft Office Word
MD5: ed5c18c07136284a09c7bcb4b9877421 SHA-1: e4f9094375f4d1ba6837f4ba2979c03dbaf0e97c SHA-256: 022c2addc545339966e20b7112c202eaf0435687edf59e275b0366b0069771b2
622 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1059 Command and Scripting Interpreter T1204.002 Malicious File

The sample contains a VBA macro with a Document_Open auto-execution routine. This macro attempts to download and execute a second-stage payload, identified as 'kikus.dll', using the 'run2l32' command. The presence of an embedded PE executable and the use of ShellExecute API calls strongly indicate a malicious intent to download and run further malware.

Heuristics 16

  • Office EPRINT stream contains EMF object high CVE related OLE_EPRINT_EMF_OBJECT
    OLE ObjectPool contains an EPRINT stream with EMF data. This is rare in normal documents and is CVE-2007-3893/MS07-046-family evidence when paired with Office exploit payload anomalies, but the malformed EMF record is not proven by this rule alone.
  • 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
  • ClamAV: Win.Trojan.Malwarex-9874388-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Trojan.Malwarex-9874388-0
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • Reference to ShellExecute API high SC_STR_SHELLEXEC
    Reference to ShellExecute 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
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • Ole10Native package carries executable/script file type high OFFICE_PACKAGE_RISKY_FILE
    OLE Package displayName or fullPath ends in an executable or script-capable extension. Even without UI extension spoofing, embedding a runnable payload inside an Office document is a high-risk delivery pattern.
  • VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC
    Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
  • Suspicious extracted artifact high 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.
  • Reference to VirtualProtect API medium SC_STR_VIRTUALPROTECT
    Reference to VirtualProtect API
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code
  • 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.openxmlformats.org/drawingml/2006/main

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
d271b1325d2e1626b5403f3c48765244b3e012139430d217da2b66e041e6c603		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 2695 bytes
embedded_office_0008ea71.exe
d4cbcbf8806901802d84926b8d447fe9ccc2188b2eab1c2bd97cbcd4c0af973f		 embedded-pe Office MZ+PE at offset 0x8EA71 300431 bytes
Detection
ClamAV: Win.Trojan.Malwarex-9874388-0
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.
ole10native_00.bin
6265fd69b48728ea63dd3958cd8738a159d68cf21428186c7cd3919b88848259		 ole-package OLE Ole10Native stream: ObjectPool/_1685829115/Ole10Native 258357 bytes
Detection
ClamAV: Win.Trojan.Malwarex-9874388-0
Obfuscation or payload: unlikely

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