Malicious PDF — malware analysis report

Static analysis result for SHA-256 4458426e232aa3ea…

MALICIOUS

PDF

73.6 KB Created: 2021-09-14 13:44:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-11
MD5: bffafc33164015abca4c017d29b98bd3 SHA-1: bc10b6393f2d1d809b556f757ec6dd60721c2d62 SHA-256: 4458426e232aa3ea9623c21f81838f3f9be4947c45fdf92418923d4f1c8f0710
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://queure.ru/uplcv?utm_term=mortal+kombat+movie+2021+full+movie PDF link annotation
    • https://irish-setter-zucht.info/ckfinder/userfiles/files/sidaxowanitenak.pdfIn PDF document text
    • https://www.shipgo17.com/plugin/ckeditor/ckfinder/userfiles/files/37999145184.pdfIn PDF document text
    • http://onsijsselstein.nl/userfiles/files/rubotodorepi.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/4835bf37eb85a9e314dda48a3945f50d/goporukojabugo.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16130b3cb01ac0---27739305000.pdfIn PDF document text
    • http://wmasgroup.com/userfiles/file/2839307575.pdfIn PDF document text
    • http://hzosm.com/images/upload/File/86699067231.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/161305e9f7524a---metefinisizunavuvozoleji.pdfIn PDF document text
    • https://hostsolutions.ro/app/webroot/files/userfiles/files/wurokikizuz.pdfIn PDF document text
    • http://around-sicily.net/userfiles/file/fevitewupufizazo.pdfIn PDF document text
    • https://cheesykeju.com/contents/files/zixujuxefuga.pdfIn PDF document text
    • https://exam11.menapoint.com/app/webroot/upload/files/16941941704.pdfIn PDF document text
    • https://art-gallery.mn/uploads/files/fafif.pdfIn PDF document text
    • http://www.pes.edu.mn/ckfinder/userfiles/files/75057671322.pdfIn PDF document text
    • http://birdwatching.sk/media/file/44944941578.pdfIn PDF document text
    • https://tourgardan.com/basefile/tourgardancom/files/5214061473.pdfIn PDF document text
    • http://kunmobile.vn/files/uploaded/20210910/file/23122774829.pdfIn PDF document text
    • https://www.area-tlc.com/public/ckfinder/userfiles/files/bawavuveran.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613937a4767b6---pibowas.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613355a8c2c2b---derazodefomux.pdfIn PDF document text
    • http://boathousebrokerage.com/userfiles/file/90697343907.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_off0000bb41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB41 10788 bytes
SHA-256: 790ba6e30826f10c24ea2f2e6702c9570978a02bc204c02a1e5da167cac33b27
font_01_sfnt_off0000d446.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD446 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ec58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC58 17192 bytes
SHA-256: 2f08d94150e0d79c4a248ae1f743f09a5c00f692dc971edf0bfbb1d3a38fa8c1