Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bfb7e1095e61987…

MALICIOUS

PDF

97.7 KB Created: 2022-03-26 22:48:28 +03:00 Authoring application: mPDF 7.1.0 First seen: 2023-12-11
MD5: ff29cf01e0154459fcd297c7f9fbe7a4 SHA-1: 474400c74b95e95036c8a713b31bd1c0ebe4972d SHA-256: 7bfb7e1095e619871a2384dc9b203d40e2c7bf43a061d76dad84200ea48f9b57
72 Risk Score

Machine Learning

  • Nyx PDF Classifier clean score 0.0010

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/8051 PDF link annotation
    • http://aldara-latinoamerica.com/userfiles/calculus-analytic-geometry-thomas-finney-9th-edition-solution-manual.xmlIn PDF document text
    • http://cokhihoangvinh.com/uploads/userfiles/calculus-a-complete-course-seventh-edition-solution-manual.xmlIn PDF document text
    • http://www.drupalitalia.org/node/77407In PDF document text
    • http://allquicker.com/images/bostitch-lhf2025k-manual.pdfIn PDF document text
    • https://www.gamastech.com/images/bostitch-h2b-manual.pdfIn PDF document text
    • http://www.drupalitalia.org/node/77408In PDF document text
    • http://aldara-latinoamerica.com/userfiles/calculus-analytic-geometry-thomas-finney-9th-editiIn PDF document text
    • http://cokhihoangvinh.com/uploads/userfiles/calculus-a-complete-course-seventh-edition-solutionIn 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_off0000580e.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (stream_007_off0000580e.bin)
🗂 Part of campaign: secureserver.net 1471 samples

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_off0000580e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x580E 19836 bytes
SHA-256: ad6d801f7554b4de8183daf312cecf2a3a65662328777b95eb4eaac8815799eb
font_01_sfnt_off00008d8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D8B 19964 bytes
SHA-256: 5154a7c8cf7a9b55c2f939ad6a4a8f8327cd6552b9f68a87c49d10dfc747eaa8
polyglot_child_pdf_off0000000f.pdf polyglot-child-pdf Secondary PDF body inside pdf container at offset 0xF 100020 bytes
SHA-256: 282712a07c85d750d29f789164d50b20cf86d4d1402ee8d4f0c64e9a725f2c56
polyglot_child_pdf_off0000001e.pdf polyglot-child-pdf Secondary PDF body inside pdf container at offset 0x1E 100005 bytes
SHA-256: 47dc04b9c79654394ec7f23007e105127d10dcbdab53bd8bb7f224b0b63504ef
polyglot_child_pdf_off0000002d.pdf polyglot-child-pdf Secondary PDF body inside pdf container at offset 0x2D 99990 bytes
SHA-256: 593fe47680c8cb1cba443bb58ad755cbaa77fd4d1d19cd403785119d62fa1708
polyglot_child_pdf_off0000003c.pdf polyglot-child-pdf Secondary PDF body inside pdf container at offset 0x3C 99975 bytes
SHA-256: 0cd3671b405e2897470afb91914e4a008d4ccf559f60e5761447aa0158ab68f3

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