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

Static analysis result for SHA-256 6c11a435e5b4c457…

MALICIOUS

Office (OLE) / .XLS

1.29 MB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 2ccabfc720b907b9a449d64f5487f33b SHA-1: 4f29a5bbdf5acee5aac58fce228a576020c32c52 SHA-256: 6c11a435e5b4c457db3a571762127199656f60725198ebcff30d29d6d8c5f455
104 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The critical heuristic firing indicates exploitation of CVE-2017-0199, which is a known vulnerability used to download and execute remote content. The embedded URL `https://snxpay.io/fzuzNBF?...` is the likely source of the secondary payload. The presence of an embedded PDF with suspicious static findings further supports a multi-stage attack. The document body is heavily corrupted and does not provide additional context.

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.
  • 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.
  • 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://snxpay.io/fzuzNBF?&vault=materialistic&moccasins=finicky&broccoli=fierce&waistband=poised&lasagna=sloppy&salt=organic&step-son=bewildered&neck

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
polyglot_child_pdf_off000b1000.pdf
a2ba09ceb48339f67d65f77150a90329364ac257779b784463523e46ffca46f3		 polyglot-child-pdf Secondary PDF body inside ole container at offset 0xB1000 624640 bytes

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