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

Static analysis result for SHA-256 781b57f2c750077f…

MALICIOUS

Office (OLE) / .XLS

1.04 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: f4d2762d6fc4b70c3c88ab984e74d7cf SHA-1: ce98c26ec0a34cd39337e94afb3d5cc8409bf944 SHA-256: 781b57f2c750077fea3540b45ab5be0a9f1eac03b02d5ebbd89e4558ec130e50
112 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The file is an OLE document that exploits CVE-2017-0199 via a URL moniker to download and execute a remote loader. The embedded PDF also contains suspicious static findings, suggesting it may be part of a multi-stage attack. The VBA macros are present but do not contain executable statements, indicating the primary malicious functionality is likely within the OLE object itself or the embedded PDF.

Heuristics 5

  • OLE2Link / URL Moniker → remote loader — CVE-2017-0199 critical CVE likely CVE_2017_0199
    Document contains an embedded OLE link object whose URL Moniker points to a remote URL. When the host file is opened, Office follows the link, downloads the URL, and processes the response based on its Content-Type (HTA -> mshta.exe, RTF → Word, etc.) — the documented CVE-2017-0199 primitive. The URL extension is not a reliable filter; servers can return different payloads to Office's user agent.
  • Secondary embedded PDF body has suspicious static findings high POLYGLOT_CHILD_PDF_STATIC_TRIAGE
    A valid PDF body was found at a nonzero offset inside another container and its carved contents matched PDF exploit or lure heuristics. This catches polyglots where the top-level magic routes to ZIP/OLE while a PDF reader or downstream parser opens the hidden PDF payload.
  • VBA project contains no executable statements low OLE_VBA_MACROS
    Document contains a VBA project, but extracted modules only contain attributes/options/comments and no executable statements.
  • PDF paints image(s) but contains no text operators info PDF_IMAGE_ONLY_LURE
    PDF has 1 image XObject(s) and the content stream contains no text-emitting operators (BT/ET, Tj, TJ, ', ") in either raw bytes or decompressed streams — this is the screenshot-as-PDF pattern used to bypass text-based scanners and to deliver instructions purely through rendered pixels. It is informational unless paired with invisible links or risky URI context.
  • 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 https://m2g.me/a080

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
7f506327609c082af1cd37dde23bc2c71a000f7d1ef530b6abb66775040a7673		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 1206 bytes
polyglot_child_pdf_off00099000.pdf
365647a5d6be3c7a46dabaf7660a55e2fd791e1ad99c8e0b6f7bb34beb76db12		 polyglot-child-pdf Secondary PDF body inside ole container at offset 0x99000 468480 bytes

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