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

Static analysis result for SHA-256 52d706ad33956028…

MALICIOUS

Office (OLE) / .XLSX

765.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel First seen: 2023-07-27
MD5: 5e1bd0332a9d41fc0a368398ed8f1405 SHA-1: 759fb17076a9d9ff14cbb29c27894bf0124a2eaa SHA-256: 52d706ad3395602899e16f8ce7b8feddc01ff775b375d9de5f13de77e0d748dd
134 Risk Score

Malware Insights

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

The critical heuristic firing for CVE-2017-0199 indicates the sample is designed to exploit this vulnerability, likely to download and execute a secondary payload from the provided URL. The embedded PDF also contains suspicious static findings, suggesting a multi-stage attack. No VBA macros were found to contain executable statements, but the overall structure points to a remote code execution attempt.

Heuristics 6

  • 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 critical 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 2 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://192.3.216.144/mgp/MGPOMGPOMGPOMGPOMGPOMPGOMPGOMMGI%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23%23MGPOMPGOMPGMGPOMGPOMG.DOC
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/pdf/1.3/
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/mm/

Extracted artifacts 5

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_off00004000.pdf
aa3c0c8a0789e09a177a6561c5a90438ea6c8dd565a4a22ab1576842b7fc3231		 polyglot-child-pdf Secondary PDF body inside ole container at offset 0x4000 767488 bytes
polyglot_child_pdf_off00009400.pdf
aa09d4f5ac21483b3862c1abb1e981c4c2c88d169b82f36d78b892cd5c4dfb02		 polyglot-child-pdf Secondary PDF body inside ole container at offset 0x9400 745984 bytes
polyglot_child_pdf_off00019600.pdf
65554f740e2d20d5ad6281fdeac274b7e90f73c9c7b14c5e1fd6f97aa456bd94		 polyglot-child-pdf Secondary PDF body inside ole container at offset 0x19600 679936 bytes
polyglot_child_pdf_off00028200.pdf
97048fdc76542be1fb2a77aff5c36c7199c64a3c643604d0ff3e28a739490c5e		 polyglot-child-pdf Secondary PDF body inside ole container at offset 0x28200 619520 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.