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

Static analysis result for SHA-256 52a3af3c37b2b9da…

MALICIOUS

Office (OLE) / .DOC

322.0 KB Created: 2021-09-16 09:43:00
MD5: e14e43e7458e6364bb257aac0ab1fd94 SHA-1: 2364dcd6473e78119764106076c0bf5a381f5b39 SHA-256: 52a3af3c37b2b9da8b6eb78c3c381ff9d8df98ab9b014d3bdc5a04e626bc0dd1
104 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The sample is a malicious OLE document containing VBA macros. The Document_Open macro is designed to create a file named 'reform.doc' in the user's template path. This suggests a delivery mechanism for a secondary payload or further infection. The macro logic is partially truncated, limiting a full understanding of its execution flow, but the intent to create a specific file is clear.

Heuristics 5

  • 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.
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code
  • Suspicious extracted artifact info 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.
  • 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/2006/encryption
    • http://schemas.microsoft.com/office/2006/keyEncryptor/password
    • http://schemas.microsoft.com/office/2006/keyEncryptor/certificate
    • http://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
c5eb4757ddca02546c29b8bb7ebe1e28259400c86649771c5092c092ea3df037		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 2971 bytes
ole10native_00.bin
1301ad2f56cb05e2e1d6e9246ec99a39f774b5cfe88be5d724e731284ad0b934		 ole-package OLE Ole10Native stream: ObjectPool/_1693260807/Ole10Native 156481 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.95, consistent with packed or encrypted content.

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