Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8315d9e351ab4cf…

MALICIOUS

PDF

88.6 KB Created: 2022-03-26 22:39:49 +03:00 Authoring application: mPDF 7.1.0 First seen: 2023-12-11
MD5: 429bd433a22ae85f4fdd2b77e842a793 SHA-1: ba41fd91b81fbf70e5c07220f6603ab133c25e63 SHA-256: f8315d9e351ab4cf3a69a48956b139b6a53cb3b74fa7c8924ae1618ee2c69740
72 Risk Score

Machine Learning

  • Nyx PDF Classifier clean score 0.0013

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 http://srwt.ru/pdf/80386 PDF link annotation
    • http://www.albergotrattoriaalcastello.com/userfiles/calculator-ti-84-plus-manual.xmlIn PDF document text
    • http://dragoniresorts.com/userfiles/calculus-11th-edition-hoffman-solution-manual.xmlIn PDF document text
    • http://www.drupalitalia.org/node/77335In PDF document text
    • https://walnutcreekdowntown.com/images/bostitch-cap-1560-manual.pdfIn PDF document text
    • http://finrusinvest-global.com/images/bostitch-cap2000p-of-air-compressor-manual.pdfIn PDF document text
    • http://www.drupalitalia.org/node/77336In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://dejavu.sourceforge.netIn extracted file (stream_007_off00004e8a.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (stream_007_off00004e8a.bin)

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off00004e8a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E8A 19780 bytes
SHA-256: 4fa1e1f62893db1504b694ba157ca733dbc9a64fe6775bec7c5c9e8d41f3a745
font_01_sfnt_off000083de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83DE 19964 bytes
SHA-256: 5154a7c8cf7a9b55c2f939ad6a4a8f8327cd6552b9f68a87c49d10dfc747eaa8
polyglot_child_pdf_off0000000f.pdf polyglot-child-pdf Secondary PDF body inside pdf container at offset 0xF 90677 bytes
SHA-256: 357e231420d8c0762a239a723c8576747f162f360598342a41dfb45a47552753
polyglot_child_pdf_off0000001e.pdf polyglot-child-pdf Secondary PDF body inside pdf container at offset 0x1E 90662 bytes
SHA-256: c35efc88aa5f2fa06748a83c5fd879ac1d1471c8ce550a544493a033fbafb9aa
polyglot_child_pdf_off0000002d.pdf polyglot-child-pdf Secondary PDF body inside pdf container at offset 0x2D 90647 bytes
SHA-256: 9dc1ea059441c44cc0830e3bb0031720ea87ce4101c41d5dae7092704153ccaf
polyglot_child_pdf_off0000003c.pdf polyglot-child-pdf Secondary PDF body inside pdf container at offset 0x3C 90632 bytes
SHA-256: ce9de6fb0139d4c887df79723fbc236bc8f6a2e621e13016902cc0a45c4ecdff

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