Malicious PDF — malware analysis report

Static analysis result for SHA-256 425d5d50f386a54c…

MALICIOUS

PDF

93.8 KB Created: 2021-08-02 01:09:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-15
MD5: ac5188e605c4ccb437002ebeafba5416 SHA-1: a4dc2cdc631fa6c9a524b3696e1f35215e67eb1d SHA-256: 425d5d50f386a54cc56a623bef08a7371bdb6b5d3a86eb21872074f68c5bd5af
96 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 5

  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://dispensapertutti.com/userfiles/files/48629483321.pdf In PDF document text
    • https://communeouchamps.fr/userfiles/file/vomijosovavap.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608092915f350---zusumuxaranelog.pdfIn PDF document text
    • http://townofwinslowin.com/flash/townofwinslowin.com/file/nusapizudakuforaximuvi.pdfIn PDF document text
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608255425d2f1---43637237153.pdfIn PDF document text
    • http://techsystem.gr/data/uploads/ckeditor/files/81060896321.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16099c5ac055b2---nanotefov.pdfIn PDF document text
    • http://scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/gaxoludemijawet.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/039b9404d5eb1fd5173f4616bac33162/48369422720.pdfIn PDF document text
    • http://ekorob.pl/userfiles/file/10665208907.pdfIn PDF document text
    • https://bruceautoservice.com/files/file/92563482376.pdfIn PDF document text
    • https://living-stone.lu/userfiles/files/pejekejedunidevugik.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160f6cc6cce08f---lutamovugijanadod.pdfIn PDF document text
    • https://daiichigroup.net/uploads/news_file/65770859847.pdfIn PDF document text
    • http://www.tokyomagic.jp/images/library/File/bejozoniwipumisebu.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/c763ef058e585916cc034a5b7566ce1a/fatifebekom.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/75716896895.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4c9b7307eb1c88375434fc93918af233/18107321270.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/1608b7d409c4e9---84104131803.pdfIn PDF document text
    • https://magatek.com/documents/file/26766565478.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f31e46ed21---jafuxozuz.pdfIn PDF document text
    • http://x-site.by/upload/editor/files/gutozuboduf.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/b0d4c0c17b081b29ecfb360d769abdf7/mediro.pdfIn PDF document text
    • https://cleaner.pl/userfiles/file/pimizusuni.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c16e44deeb---67779375051.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=dr+collins+pcat+prepPDF link annotation
    • 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://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In 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_off00010bac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BAC 17716 bytes
SHA-256: b1e6c0f7ab098ce98fda147fffa86b0e4149df49844692acd3d4e2bad544beb1
font_01_sfnt_off000139d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139D4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000151eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151EB 10368 bytes
SHA-256: ae1aa3c9de3da0821279c2d0d1f327c4d6d975e61970e6f625604f6c11ce9c87