Malicious PDF — malware analysis report

Static analysis result for SHA-256 78284053e8f1e5c9…

MALICIOUS

PDF

92.7 KB Created: 2021-08-05 07:52:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-16
MD5: dc31cea0ac21975016342ed68a9f3d88 SHA-1: 7e90dd1de67e4e33717e5e628a8b9b76e23d602c SHA-256: 78284053e8f1e5c9908d809a50178b8f3951fdab17f5a88db183260940624370
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a565783a296---29307417019.pdf In PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b4ac9279f6---22682340647.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16100ca5d0c797---7816951331.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085de041ec90---wowom.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/48dcb098ad9f8a3db4bf89edb9cf6151/72782760223.pdfIn PDF document text
    • http://grawerlik.pl/userfiles/file/20572695760.pdfIn PDF document text
    • http://divorcefinance.nl/uploads//file/lerasob.pdfIn PDF document text
    • https://spitalmoldovanoua.ro/ckfinder/userfiles/files/57954938148.pdfIn PDF document text
    • http://allaboutdowney.com/userimages/88023189851.pdfIn PDF document text
    • http://adria-ex.com/images/blog//file/feregipi.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/e3hro1vrp8963j8619uvp5fndd/89136511338.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/mosefegowuzu.pdfIn PDF document text
    • http://oguzlarotomatiksanziman.com/depo/sayfaresim/file/foradasufawawezosovug.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/684ff3ibnhin0729lek5947ilo/sotunogipomeju.pdfIn PDF document text
    • http://amrapalispot.com/userfiles/file/mimurizosavinofipufofugo.pdfIn PDF document text
    • http://dges.in/userfiles/file/lukukivuduneludufebuvazod.pdfIn PDF document text
    • https://fenixfalt.com/userfiles/file/buwubafosuwo.pdfIn PDF document text
    • http://baaningdoi.com/file_media/file_image/file/63488234993.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/1610395960a370---lozozofovofejasiveju.pdfIn PDF document text
    • https://zapcdn.space/web/img/podborky/files/92343647182.pdfIn PDF document text
    • https://pingthye.com/userfiles/files/73026267264.pdfIn PDF document text
    • https://sanvexe.vn/webroot/img/files/72451021273.pdfIn PDF document text
    • http://alteredcompta.com/buddha/ckfinder/userfiles/files/kadilif.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160833471ab299---70058770441.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/78791c30d3abf740685628e840566bbb/bijotisutejazek.pdfIn PDF document text
    • https://investmentskillsgroup.com/images/userfiles/file/38083707949.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=best+car+racing+game+app+downloadPDF 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_off00010293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10293 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011aaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AAA 10996 bytes
SHA-256: 2a9372662e4c06a8a7bc6d87e741acda68bbb030df6ea4fc76aafc3586b84b0e
font_02_sfnt_off0001340c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1340C 18712 bytes
SHA-256: 4859cfca5edd4e55da85023a5dbf9f44b802c7d265e6481813b49a98706d6257