Malicious PDF — malware analysis report

Static analysis result for SHA-256 425adcdf67b2f4b3…

MALICIOUS

PDF

274.4 KB Created: 2021-12-16 23:47:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-15
MD5: dce9166396d0b83004945c9f8518ff1b SHA-1: 9a0bf3ccb088d86af1168e6044e26a346668dbc8 SHA-256: 425adcdf67b2f4b3c47cc83ec1877e6f813de27a765c1e99132e60aec50a0028
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.7309

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://kiemtoandongnghi.com/public/plugins/ckfinder/userfiles/files/nurazin.pdf In PDF document text
    • http://archinfo.ru/uploads/file/36166736296.pdfIn PDF document text
    • http://elhammagazine.com/ckfinder/userfiles/files/8739180074.pdfIn PDF document text
    • https://ipic.vn/userfiles/file/33455454004.pdfIn PDF document text
    • https://living-stone.lu/userfiles/files/sedasebosulazaxutun.pdfIn PDF document text
    • http://vanprodukt.cz/UserFiles/File/90656245009.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/b18c8fefc4cd35ddc017564c790e3a47/90271087982.pdfIn PDF document text
    • http://hondasushi.com/uploads/files/zuzazirekejebiges.pdfIn PDF document text
    • https://tramhuonghanoi.vn/upload/files/9700200933.pdfIn PDF document text
    • https://szaniterplaza.hu/ckfinder/userfiles/files/34509691129.pdfIn PDF document text
    • http://litho-and-co.fr/ckeditor/upload/files/58787632933.pdfIn PDF document text
    • http://aaykpn.com/uploads/editor/files/26154041225.pdfIn PDF document text
    • http://telektrans.hu/editor_up/jewilirapagobelewu.pdfIn PDF document text
    • http://vinhosnorte.com/images/files/90430282194.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/161a04408d1029---55768261247.pdfIn PDF document text
    • http://msinziniering.com/userfiles/file/migunofulirizekogefadotu.pdfIn PDF document text
    • https://likeevent.it/writable/public/userfiles/file/sonivufusole.pdfIn PDF document text
    • http://kozelskadm.ru/files/uploads/files/32297418505.pdfIn PDF document text
    • https://bold-iot.com/uploads/files/202111272146582935.pdfIn PDF document text
    • http://winecellarkeeper.com/ckfinder/userfiles/files/71301951428.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16185883f3c9bd---dapuvobavekikodefadeb.pdfIn PDF document text
    • http://vaness-sens.fr/ckfinder/userfiles/files/pexebamojepozo.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614e64dfadde0---nusesazivefelagoxe.pdfIn PDF document text
    • http://igabana.com/upfolder/e/files/20210907121913.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/KGDyd8lM0uI/uplcv?utm_term=multiplying+and+dividing+integers+word+problems+worksheet+with+answer+keyPDF 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_off0003d791.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3D791 18928 bytes
SHA-256: bab273bf4c5172f4667e5f6f20cec6ac384979541516d6c691a311a8c62f29f0
font_01_sfnt_off000408a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x408A1 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336
font_02_sfnt_off00041f45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x41F45 11428 bytes
SHA-256: ec3a204e40be35a39513c5a1787c85c74ec1ebde97c11dcbcfab48669c14040f