Malicious PDF — malware analysis report

Static analysis result for SHA-256 af28135990baa075…

MALICIOUS

PDF

479.9 KB Created: 2022-02-04 11:17:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-21
MD5: cb8b6f4c9d5aad63faa8105edd5920e5 SHA-1: 691c5fac3461bf0a741ca7e489b81f9759edcd49 SHA-256: af28135990baa0757a1fffac53835a9419941588e7df4dc7401b44f17db70b0e
136 Risk Score

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4616

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 https://mifuj.co.za/XSRYdR1H?utm_term=solubility+curve+problems+and+answers PDF link annotation
    • http://voyagerav.com/v15/Upload/file/202214052473546.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1615a979444dac---sitomipesofudenudos.pdfIn PDF document text
    • https://grandiosieventinuziali.it/filesUploads/file/37505220457.pdfIn PDF document text
    • https://pottoka.info/files/galeria/files/dumeravodaravepo.pdfIn PDF document text
    • https://cakenepal.com/userfiles/file/gudesafusaditurigigidaf.pdfIn PDF document text
    • https://cobrawire.com/userfiles/files/benodadewefazewi.pdfIn PDF document text
    • https://33mobility.net/uploads/files/27406130060.pdfIn PDF document text
    • http://bibliotekaludwin.pl/img/upload/files/sifelanes.pdfIn PDF document text
    • http://dpnovelty.com/upload/files/29447098933.pdfIn PDF document text
    • http://lavalnerina.it/userfiles/file/gemanod.pdfIn PDF document text
    • http://hanart21.com/files/userfiles/file/kebugu.pdfIn PDF document text
    • http://intertexmedical.com/userfiles/files/87562043915.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ec4c22727ba---rexuburatarikugatomene.pdfIn PDF document text
    • http://oldstat.ww.tj/img/file/xuwev.pdfIn PDF document text
    • https://suavitinhtannha.net/upload/files/19395261754.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/161f4f10dbd9bb---tomurefupakoxabonorilurun.pdfIn PDF document text
    • http://kahounova.cz/userfiles/file/fupanudona.pdfIn PDF document text
    • http://www.umadai.com/ckfinder/userfiles/files/39165043650.pdfIn PDF document text
    • http://narnivet.com/userfiles/files/82652495360.pdfIn PDF document text
    • http://musicpark-live.com/userfiles/file/85980405700.pdfIn PDF document text
    • http://cleangroupbd.com/ck/upload/files/13002854916.pdfIn PDF document text
    • https://alajuusa.ee/media/contents/file/kumifumenudevivukoz.pdfIn PDF document text
    • http://siriussiramatik.com/panel/kcfinder/upload/files/65556148873.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/1612d9519250d5---22764585954.pdfIn PDF document text
    • https://zooiguana.pl/app/webroot/media/files/lenixawimupidakopidowi.pdfIn PDF document text
    • https://daquin-ferriere.fr/userfiles/file/wuwavaxekumepejozuzoji.pdfIn PDF document text
    • https://olboihorgaszto.hu/editor_up2/tovusofimudufate.pdfIn PDF document text
    • http://mustang.tom.ru/jsplugins/ckfinder/userfiles/files/87613884435.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_off00071450.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71450 16428 bytes
SHA-256: 53220d3e1df9d2c48018227b4279fc38eb67ae6d087d32ad9816941c540b991e
font_01_sfnt_off00073ef0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73EF0 11256 bytes
SHA-256: 60d51f81adfdc96e4e26390fb70841cf8d7adad9b3c9389dfa9c08eb4af98584
font_02_sfnt_off00075933.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75933 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9