Malicious PDF — malware analysis report

Static analysis result for SHA-256 445c8960136e824e…

MALICIOUS

PDF

56.8 KB Created: 2025-05-09 23:54:40 +01:00 Authoring application: mPDF 6.0 First seen: 2026-06-12
MD5: 67dc66eb1f61ebb55ccf4165f78f9211 SHA-1: 49426a1923655e313eb80c14393e979e8e808d41 SHA-256: 445c8960136e824eb8dfa0b8e0189f5f25c307a2fc54007e7184e95e3ec5c42d
72 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document that contains embedded URLs, one of which is presented as a confirmation link. The heuristic firings indicate it's a fake invoice or payment lure, and that it contains a secondary embedded PDF with suspicious findings. The embedded URLs likely lead to a phishing or malware download site, attempting to trick the user into clicking them. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier clean score 0.0019

Heuristics 4

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://coachhire.com.au/confirm-order?qid=VFdwQmVVNVRNSGRPVXpCM1QxRTlQUT09Zkh4WlRFTlRVREF4TkRBeU5qazE= PDF link annotation
    • https://coachhire.com.au/pdf_invoice.php?id=RWNtSm91bmV5fHw0MDI2OTU=&v=1746831278In PDF document text
    • https://coachhire.com.au/termsIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000021ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21EE 26192 bytes
SHA-256: 1a56ba1bf68f5240c6fa883f21c292901726c565d1d1da1bfb83f303f88bca2e
font_01_sfnt_off000058fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58FA 27040 bytes
SHA-256: f02f0deeae9fc99e362302984d4b819ab41692b4540fcdc15039675d31c72694
polyglot_child_pdf_off0000000f.pdf polyglot-child-pdf Secondary PDF body inside pdf container at offset 0xF 58168 bytes
SHA-256: 87696d08f810f6c74cc8c53f03e241aa0372b84eaf8d929eb652421a427f2da3

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