Malicious PDF — malware analysis report

Static analysis result for SHA-256 f87a4315cdd6494b…

MALICIOUS

PDF

76.6 KB Created: 2021-09-22 14:09:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-16
MD5: 04b382ac4ba1d7b375153c5ef1771542 SHA-1: 35c94c8be41fdb4858bc272d8c04c520a63894b0 SHA-256: f87a4315cdd6494b620a92914464376faab4f15980f405c0bbcf123af5b4089a
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 https://drafthe.ru/uplcv?utm_term=avatar+game+friv PDF link annotation
    • http://fine-cottage.ru/userfiles/files/geworifevefetobatonezi.pdfIn PDF document text
    • https://vegas-shop.net/uploads/files/baximumapadiwup.pdfIn PDF document text
    • http://hfengly.dk/skoleportalen/userfiles/file/xepezikozogesas.pdfIn PDF document text
    • http://saluteebenesseresas.it/userfiles/files/jurabodamedekogawejojo.pdfIn PDF document text
    • http://optimumnieruchomosci.pl/uploads/userfiles/files/vewero.pdfIn PDF document text
    • http://maciejabramowicz.pl/upload/files/file/setajukaxurobo.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/a96da31c240243bc00749862fda1059e/5457566445.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/161371919e4829---buwemutilotebifizupasi.pdfIn PDF document text
    • http://form4concrete.ru/pics/cont/file/labulavevuxoliwizi.pdfIn PDF document text
    • http://www.blueoak.fr/image/file/81236568113.pdfIn PDF document text
    • http://yachtales.net/admin/userfiles/files/rasesexilatefapasefalezo.pdfIn PDF document text
    • http://tamtamphat.com/upload/files/54560287374.pdfIn PDF document text
    • http://wadsoda.com/UserFiles/File/59918906837.pdfIn PDF document text
    • http://defhjdrjioo.friend-match.com/upload/files/zakevam.pdfIn PDF document text
    • http://themadthinker.com/temp/vinney/HTML/userfiles/file/mupipuwi.pdfIn PDF document text
    • https://samoinstitute.mn/uploads/assets/file/lunazimujizomaf.pdfIn PDF document text
    • https://sardavetri.it/userfiles/file/32415446677.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b556eaa222---91328852189.pdfIn PDF document text
    • https://ventadeterrenosagricolas.com/userfiles/file/35185686797.pdfIn PDF document text
    • http://clinicaveterinariabilancino.it/userfiles/files/fanuba.pdfIn PDF document text
    • http://improntediteatro.it/userfiles/files/dirakasetafowipi.pdfIn PDF document text
    • https://klcconsulting.eu/klc/file/kudosigitoripunugiputugul.pdfIn PDF document text
    • http://mexxeopaint.com/upload/files/fuxesawerosakijuzelovi.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_off0000cb3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB3E 16592 bytes
SHA-256: a73fc365def400c06efc6e41338c14b70b9ec9660d5c67b68907dda0548561ee
font_01_sfnt_off0000f640.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF640 10168 bytes
SHA-256: bd514e6b5f91be7a9fa54e93d5296e0ab78238addda581a0951efa85f96a9c07
font_02_sfnt_off00010d12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D12 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1