Malicious PDF — malware analysis report

Static analysis result for SHA-256 af28489cbaf17977…

MALICIOUS

PDF

329.6 KB Created: 2021-12-21 11:45:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-21
MD5: 2872058526e776efa69396a88dac9f62 SHA-1: 454cda46e86ddd2986a8b4d5880d81e239e549a2 SHA-256: af28489cbaf17977963a4ac68f2f7e4b3baffd221107fab4ce089cb174e2f551
174 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.7701

Heuristics 7

  • 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.
  • 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://tuinvandecruys.be/file/tusivojetijajavesomid.pdf In PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/16139299733500---31920875790.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/16177254200dde---42440616463.pdfIn PDF document text
    • https://nepalonetours.com/userfiles/files/diniropodave.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/6k9b28q3mevsf6l8lsct7hdrd5/kokulisigutusavogojixema.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/161c1876e37d67---13069117519.pdfIn PDF document text
    • http://elai.kz/upload/2021/11files/211106155010427105gsvvm.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1618848c6213bf---depofovun.pdfIn PDF document text
    • http://skogsformedling.se/bilder_umeny/File/8925670609.pdfIn PDF document text
    • http://piemonteforyou.it/userfiles/file/67325486969.pdfIn PDF document text
    • http://elearnhouse.com/userfiles/file/mojominija.pdfIn PDF document text
    • http://pasquarelloplumbing.com/UserFiles/file/46433537132.pdfIn PDF document text
    • https://villatoscana-pi.it/userfiles/file/numul.pdfIn PDF document text
    • https://galaxytraining.examinationonline.com/files/4877033113.pdfIn PDF document text
    • http://fullhousetourism.com/UploadFiles/file/20211122052657122.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/579a114b212d73dff4c611af1cada52c/bemidugofatemakine.pdfIn PDF document text
    • http://jualumnitoronto.com/editor/uploadfiles/judegi.pdfIn PDF document text
    • http://burmeseburmilla-allevamento.com/userfiles/files/86260723417.pdfIn PDF document text
    • https://pasarangroup2.com/contents/files/manozakonojabipokozefexan.pdfIn PDF document text
    • http://www.barrettmotors.com.au/templates/admin/js/kcfinder/upload/files/gasubigiluturadolilovok.pdfIn PDF document text
    • http://studioingtassinari.eu/userfiles/files/95958031858.pdfIn PDF document text
    • http://autoescuelatosal.com/galeria/files/tajowonu.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/HKUGBsJGI0E/uplcv?utm_term=aggiornamento+android+huawei+p20+litePDF 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_off0004b538.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B538 11080 bytes
SHA-256: 1ab01395f634ecfd498034ee6a610b24c5d9643668ff30cd96bb6d13a21ef4f8
font_01_sfnt_off0004ceac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4CEAC 18796 bytes
SHA-256: 9fe78b0074ef0d5b9b19add18cfbf040995c8343a45caf1d872d346e2a909f81
font_02_sfnt_off00050014.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50014 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336