Malicious PDF — malware analysis report

Static analysis result for SHA-256 f999a64c18518cbe…

MALICIOUS

PDF

337.4 KB Created: 2022-03-23 23:38:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-13
MD5: c1899edc6e6fd55b19dbb03933e6fc21 SHA-1: c26f90c15ae822d0c8ed0a81a9c7c5601a52bf37 SHA-256: f999a64c18518cbe8db67a5df33c36c42a889e58dda03f7d7074ff210bd2a242
174 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.5565

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://yubit.co.za/XSRYdR1H?utm_term=surrender+experiment+pdf PDF link annotation
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16200f16c5a0b0---kotutinenigazejuzegefuv.pdfIn PDF document text
    • https://funbugs.ie/userfiles/file/79676573293.pdfIn PDF document text
    • http://prttour.ca/FileData/ckfinder/files/20220204_E70DBC3E01031BEC.pdfIn PDF document text
    • http://aristosaigonhotel.com/uploads/files/14976435936.pdfIn PDF document text
    • https://www.madenisg.org.tr/kcfinder/upload/files/wuwokanumiko.pdfIn PDF document text
    • https://kibledergisi.net/resimler/files/49391561813.pdfIn PDF document text
    • http://mtqindia.com/app/webroot/uploads/files/sewefibexufotezatiba.pdfIn PDF document text
    • https://www.vasutaszeneiskola.hu/ckfinder/userfiles/files/50353234305.pdfIn PDF document text
    • https://i-triada.net/upload/files/58751320685.pdfIn PDF document text
    • https://plasticosgyc.co/kcfinder/upload/files/betiwufalikunelodazu.pdfIn PDF document text
    • https://liad-alger.fr/admin/style/js/edit/kcfinder/..%5Cimages%5Ccontenue/files/pelezepoxarupuko.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/dekibo.pdfIn PDF document text
    • https://rockvalleytravel.net/files/files/wewener.pdfIn PDF document text
    • https://alwaysthesame.pt/site/upload/file/pewujo.pdfIn PDF document text
    • https://highfieldhousehotel.net/nbloom/fckuploads/file/56164128560.pdfIn PDF document text
    • http://anitacalderon.com/ckfinder/userfiles/files/dulixe.pdfIn PDF document text
    • http://owop.challengersports.com/ckfinder/userfiles/files/nasejomevojodejaganebazi.pdfIn PDF document text
    • https://ttablaksystem.hu/files/file/lonowudasoxurojezalate.pdfIn PDF document text
    • http://thsport.dk/ckfinder/userfiles/files/64272497827.pdfIn PDF document text
    • http://bilasiparacollege.org/assets/kcfinder/upload/files/67836695781.pdfIn PDF document text
    • https://angkortaxiservice.com/userfiles/file/82713187855.pdfIn PDF document text
    • http://bc-nosingtasting.com/bestanden/files/45485155074.pdfIn PDF document text
    • http://zdk-engels.ru/upload2/files/rosawa.pdfIn PDF document text
    • http://vstarmp.cn/upload/files/20220201_192839.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/161f9211abf061---69584166876.pdfIn PDF document text
    • https://moruslondinium.org/img/files/6090904997.pdfIn PDF document text
    • http://ximangsongthao.com.vn/app/webroot/uploads/files/70832604741.pdfIn PDF document text
    • https://febrerasesores.com/uploads/kcfinder/upload/files/gafipakobufejoz.pdfIn PDF document text
    • http://hurtglass.pl/upload/file/25724424524.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16205a05a3f572---45449655189.pdfIn PDF document text
    • http://suchanekstomatolog.pl/files/file/tabozupi.pdfIn PDF document text
    • https://swaarm.de/app/webroot/upload/files/rivim.pdfIn PDF document text
    • http://modnyi-buket.ru/uploads/files/puximopiga.pdfIn PDF document text
    • http://krupongs.com/images/file/kobanixude.pdfIn PDF document text
    • http://tomekorea.com/userData/board/file/55936135702.pdfIn PDF document text
    • https://petikdaun.com/contents/files/50215047622.pdfIn PDF document text
    • https://www.afsti.org/admin/kcfinder/upload/files/23940809370.pdfIn PDF document text
    • http://packagingandfoodmachinary.com/userfiles/file/dogar.pdfIn PDF document text
    • http://gelinyuanyi.com/upload_fck/file/2022-2-15/20220215043655818374.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1623122a1a2d56---80553392544.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_off0004d998.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D998 10440 bytes
SHA-256: e981fc87bb6ffce75afe8fc246d77987c75c30e8ae1ede490c4e57c0e789ada8
font_01_sfnt_off0004f144.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F144 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9
font_02_sfnt_off0005085f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5085F 17520 bytes
SHA-256: aafaa2760018af00eeed48780d2cda8e7f1fa8dbbe1aed0460e8c81e1b22e647

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