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

Static analysis result for SHA-256 b86e4c334af2fdbe…

MALICIOUS

Office (OLE) / .XLS

1.04 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 912e8c547d1e8dd1e12afbd819074b30 SHA-1: 96fd97dc12ae0a792c85fdf7ec9a2424a90097b3 SHA-256: b86e4c334af2fdbe88b3cb50cd85c47eac10a9e9b9ac7c0dd656e37cabce7a5a
110 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1059.005 Visual Basic

The critical heuristic firing indicates exploitation of CVE-2017-0199 via an OLE2Link object, which attempts to load a remote resource from the URL 'https://wrath.me/EhYykL'. The presence of a secondary embedded PDF, which itself has suspicious static findings including an image-only lure, suggests an attempt to obfuscate the malicious payload and entice user interaction. No VBA macros were found to contain executable statements, indicating the primary malicious functionality is likely within the OLE object itself.

Heuristics 4

  • 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.

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
7f31552af03c26d6dbedb93b8d7f9407e398549036fe5235ba15667bd2278198		 polyglot-child-pdf Secondary PDF body inside ole container at offset 0x99000 467968 bytes

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