Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8bf97de37a6a898…

MALICIOUS

PDF

354.9 KB Created: 2022-03-01 00:27:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-04-06
MD5: f56c1e59d7aec6cc9514980da81bde50 SHA-1: 6ba073361ac9426b0584efd9b1b8e5a6002883ce SHA-256: a8bf97de37a6a89842537841969366bfbb676458f3208ca41b70d605fc22e277
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.6981

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.
  • 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://fialki.su/wifuvumagativi.pdf In PDF document text
    • http://challendor.com/fckeditor/upload/file/57685105098.pdfIn PDF document text
    • http://belean.pl/userfiles/file/23359764863.pdfIn PDF document text
    • https://dvcard.dsverano.com/UserFiles/File/kofiju.pdfIn PDF document text
    • http://cistenivytahu.cz/upload/file/naxezejerudenoso.pdfIn PDF document text
    • http://szhlfz.net/upload/45474067075.pdfIn PDF document text
    • https://loyq.ru/admin/upload/photos/library/files/volad_1644360731.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/ef648b4e2f368ae65fff4a07b60b7a58/jozozumekedodonoj.pdfIn PDF document text
    • http://9jamail.com/FCKeditor/editor/filemanager/connectors/userfiles/file/fupajoduketax.pdfIn PDF document text
    • http://tse.net.in/assets/ckeditor/kcfinder/upload/files/73697672829.pdfIn PDF document text
    • https://taumed.kz/upload/2022/02files/220228202231796923b4j19.pdfIn PDF document text
    • http://fiumaradelsossio.it/userfiles/files/rugezifefeboledija.pdfIn PDF document text
    • http://silexsys.com/ckeditor/kcfinder/upload/files/xilenisujibefunurikanut.pdfIn PDF document text
    • http://yilbasipromosyonu.com/userfiles/file/wolubexurow.pdfIn PDF document text
    • https://getadoc.in/ckfinder/userfiles/files/56872723032.pdfIn PDF document text
    • https://nirmalamathachurch.org/cms_uploads/image/file/sefuko.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1620c41b5ec860---43534295959.pdfIn PDF document text
    • https://www.aspart.ro/ckfinder/userfiles/files/suxevulosudakogapiva.pdfIn PDF document text
    • https://hophamthaibinh.com/upload/files/44839269751.pdfIn PDF document text
    • http://cluboutletmoto.net/campannas/file/wadogelozonoruruz.pdfIn PDF document text
    • http://medicapoland.pl/uploaded/file/zobirusaduve.pdfIn PDF document text
    • http://ghinelliarchitettura.it/userfiles/files/95987235268.pdfIn PDF document text
    • http://sieuthiduanbds.com.vn/kcfinder/upload/files/76629479199.pdfIn PDF document text
    • http://formanwoman.ru/userfiles/files/31101347109.pdfIn PDF document text
    • http://hk-sai.com/ckfinder/userfiles/files/26432707984.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16205ac15c22ab---82637848774.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/1620aba0c463f5---14573466541.pdfIn PDF document text
    • http://sadiqandsons.com/userfiles/files/darijatejukebugoloweguxil.pdfIn PDF document text
    • http://live-lessons.net/lcj/web/uploads/assets/file/68661297704.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/34fd8675f9449b9de07ae1cfd7ff2a64/defevepajosafijejud.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/1620c0cdcb2f2c---jorixudukanipovutom.pdfIn PDF document text
    • http://durgaenergy.com/assets/kcfinder/upload/files/xixin.pdfIn PDF document text
    • http://wish-pharma.com/upload/files/jiwijufanasuxonigubanijov.pdfIn PDF document text
    • http://huseyindurmuslar.com/images_upload/files/34297665055.pdfIn PDF document text
    • https://www.tri-or.fr/tri-or/ckfinder/userfilesfiles/fiwular.pdfIn PDF document text
    • https://colod.co.za/XSRYdR1H?utm_term=mcdougal+littell+inc+answersPDF link annotation
    • https://egyptsuntours.com/userfiles/files/kuxokofivu.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 extracted file (font_00_sfnt_off0005172f.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0005172f.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0005172f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5172F 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9
font_01_sfnt_off00052e4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52E4A 20492 bytes
SHA-256: 8322d51c8a6de156731eba869e9b5955b441145389fb2a66dc8634a0cbaa8cd4
font_02_sfnt_off000562fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x562FB 10724 bytes
SHA-256: 1c4f1444eb300199335db442e35761ab721e8786460659cb4e52f495864ec5cc