Malicious PDF — malware analysis report

Static analysis result for SHA-256 634c1a939d7185c3…

MALICIOUS

PDF

301.4 KB Created: 2021-12-27 00:46:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-04-29
MD5: 9b837652552fd0e29c87e310ed3543f1 SHA-1: bfbd89386d2d134446c1180a81c024929e298525 SHA-256: 634c1a939d7185c37c8793e6afd7cd13e0e0267a6a4968aad5dcaf64f7c6676a
251 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.8407

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Viral-video clickbait PDF links to suspicious host critical SE_VIRAL_VIDEO_CLICKBAIT_LINK
    Document uses viral/leaked-video lure text and links to a suspicious disposable-looking web host. This is a clickbait/traffic-scam carrier shape rather than a benign PDF link.
  • 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.
  • PDF advertises pirated movie streaming/download medium PDF_PIRACY_STREAMING_LURE
    PDF rendered text advertises free full-movie streaming or download using piracy-brand names or a 'full movie + download/free/watch' intent phrase — recovered after folding the styled Unicode confusables the campaign uses to hide those keywords from plain-text detection. These are disposable SEO-spam carriers that route users to malvertising, fake-player, and scam pages; the PDF itself is inert.
  • 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://architektor.ru/uploads/file/37463316295.pdf In PDF document text
    • http://keletunderground.hu/images/uploaded_pics/file/xoxenibupulis.pdfIn PDF document text
    • http://wecans.net/_UploadFile/Images/file/xexuvawewodajesopax.pdfIn PDF document text
    • http://machi-tomo.xyz/js/ckfinder/userfiles/files/tibowor.pdfIn PDF document text
    • https://elesud.it/img_pagine/file/fujid.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1618257b21e19c---getenukamerozatukumurojek.pdfIn PDF document text
    • http://boxshop.mn/userfiles/files/rejipesadanomasazevud.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1617c274087861---pikizobu.pdfIn PDF document text
    • https://dichvumayphoto.vn/webroot/img/files/63738559648.pdfIn PDF document text
    • http://mh-gartengestaltung.de/userfiles/file/tubanexirixole.pdfIn PDF document text
    • http://dptour.net/bot/ckfinder/uf/files/91126305413.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16155ad19ef645---depusemijodowowudi.pdfIn PDF document text
    • http://tlcjty.cn/userfiles/aa/file///witapodofefufofujap.pdfIn PDF document text
    • https://www.domaine-vrignaud.com/ckfinder/userfiles/files/mozolubopamutuzisalirej.pdfIn PDF document text
    • http://djk-winkel.de/images/uploads/file/widadaleseri.pdfIn PDF document text
    • http://candientushinko.com/images/file/86638597259.pdfIn PDF document text
    • http://man-shoes.moscowfashion.net/content/xuploadimages/file/73041945068.pdfIn PDF document text
    • http://embauchecadre.com/kcfinder/upload/files/38829613923.pdfIn PDF document text
    • https://siriusdynamics.com/assets/uploads/files/kifewa.pdfIn PDF document text
    • https://hizlipin.com/calisma2/files/uploads/zejebu.pdfIn PDF document text
    • http://mediaworld.pro/ckfinder/userfiles/files/95237266369.pdfIn PDF document text
    • http://s4l.vn/storage/ckfinder/files/87884691662.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/RhDyTiV0TgQ/uplcv?utm_term=borrowing+subtraction+worksheets+grade+2PDF 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 extracted file (font_00_sfnt_off00044c49.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off00044c49.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00044c49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x44C49 11196 bytes
SHA-256: 849809db5472a3372d05d4e90900b7cc45afa5e4c12688774a47506a72bfe62c
font_01_sfnt_off0004666d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4666D 16088 bytes
SHA-256: e14682687ed8408220d27cca8c6f11e53f8112a27d75c84e059f044c22fa6ffc
font_02_sfnt_off00049013.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49013 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336