Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e313a503637d3b4…

MALICIOUS

PDF

72.1 KB Created: 2021-10-02 21:05:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-19
MD5: b3565ef2505f5c7766afa92ef2b4bc1c SHA-1: 6775aa6a7f2a85a952464b7d66ac96cef641ad7b SHA-256: 4e313a503637d3b4cf985c0c915fbc04eeafde2b2478b00cca11bf6bfd875d10
104 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 https://infrive.ru/uplcv?utm_term=the+game+of+their+lives+full+movie+online PDF link annotation
    • https://univerosg.com/ckfinder/userfiles/files/43273901346.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613983ebb8243---28792185137.pdfIn PDF document text
    • http://exosushi.com/uploads/files/17797046455.pdfIn PDF document text
    • https://alexandrapanayotou.com/web/images/static/file/katexijowelapimod.pdfIn PDF document text
    • https://synersys.fr/contenu/file/70628502788.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/375n7f4gcj963buj9qrfackkr0/magebozafalawedevu.pdfIn PDF document text
    • http://nguoigiupviec99.com/webroot/img/files/suwixatuxobani.pdfIn PDF document text
    • http://cen7dias.es/userfiles/files/49248950874.pdfIn PDF document text
    • http://pokorny-podlahy.cz/UserFiles/File/21884454046.pdfIn PDF document text
    • http://stellar-toys.com/ckfinder/userfiles/files/xifepanudet.pdfIn PDF document text
    • http://neonatal-surgery.ru/userfiles/files/64336638158.pdfIn PDF document text
    • http://khmim.com/ckfinder/userfiles/files/63920356073.pdfIn PDF document text
    • https://bookmyexcellence.com/bookmyexcellence/js/ckfinder/userfiles/files/44999971556.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/1614b858467038---dikoximuso.pdfIn PDF document text
    • http://aylincinarli.com/fckfiles/file/52457254861.pdfIn PDF document text
    • http://alompar.hu/uploads/content_files/files/76101955357.pdfIn PDF document text
    • http://ylgems.com/file_media/file_image/file/fukazese.pdfIn PDF document text
    • http://ekorepetycje.eu/Upload/file/63123482534.pdfIn PDF document text
    • http://jin16888.com/userfiles/file/87626712089.pdfIn PDF document text
    • http://egyptlance.com/userfiles/file/13624938927.pdfIn PDF document text
    • https://webaruhaz.codefon.hu/js/ckfinder/userfiles/files/18903494984.pdfIn PDF document text
    • https://floridainvestment.cz/files/file/49231759206.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ebb9d8fe95---72659217339.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/p2m0mfp2q0j9al9p6fs1fps58g/39386970856.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/620fd7879a7f05a520636a5b15d58bc7/87845642551.pdfIn 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://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_off0000b546.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB546 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cd5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD5D 10792 bytes
SHA-256: 32461108ff70669c235b4d3d9ad4763954635f3dc2f65b292103c12ea6a66d07
font_02_sfnt_off0000e613.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE613 16600 bytes
SHA-256: edae863c62d00f663e526a119a492c8afb0988c62a2c32e71e2013063f00319b