Malicious PDF — malware analysis report

Static analysis result for SHA-256 88b839ddbb9ef615…

MALICIOUS

PDF

316.8 KB Created: 2022-04-12 06:11:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-04-02
MD5: e6665c95eb55c2ad53744a37fcf00221 SHA-1: ea3784575e1a679b81f9dc92fab5a2274b8c6c41 SHA-256: 88b839ddbb9ef6153c10a5745feda098ac2f93fcecedeac572427583a320569c
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.6043

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://riausky.com/editor/kcfinder/upload/files/zazaposiredipasulinuwal.pdf In PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/06ef632e6693a2308fb83e6dd9799d7e/vitafivexalibijusexi.pdfIn PDF document text
    • http://webhoctot.com/app/webroot/uploads/files/wijewekujuwuzexibex.pdfIn PDF document text
    • http://atthaya.com/file_media/file_image/file/fawojar.pdfIn PDF document text
    • https://webrobogo.hu/kepek/zonavug.pdfIn PDF document text
    • http://hong-tour.com/FileData/ckfinder/files/20220213_C831798472403C8C.pdfIn PDF document text
    • https://sifimimufiwiz.weebly.com/uploads/1/3/4/0/134000394/3973261.pdfIn PDF document text
    • https://kingdomofgodmn.org/userfiles/files/30210209020.pdfIn PDF document text
    • https://cengilli.com/icerik_images/file/18500372884.pdfIn PDF document text
    • https://pisanalanuju.weebly.com/uploads/1/3/4/3/134352438/losutaw-zutotigonefibov-numudos-sudikezowive.pdfIn PDF document text
    • http://program-pro.ru/userfiles/files/65426698103.pdfIn PDF document text
    • https://revamimetanezoj.weebly.com/uploads/1/3/4/5/134597499/a23203f9.pdfIn PDF document text
    • https://nbgroup.az/userfiles/file/29971720411.pdfIn PDF document text
    • https://mafidusat.weebly.com/uploads/1/3/4/1/134109097/5164706.pdfIn PDF document text
    • https://falusawo.weebly.com/uploads/1/3/6/0/136084102/2475356.pdfIn PDF document text
    • https://womegirig.weebly.com/uploads/1/3/4/5/134506381/giroxataju-nitesedoloz-fixigupa.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16247b207bb891---zeziwepebadidito.pdfIn PDF document text
    • http://think6.net/ckfinder/userfiles/files/20220207105430.pdfIn PDF document text
    • http://ivankotov.ru/img/lib/file/9049498073.pdfIn PDF document text
    • http://www.cerradurasytornillos.com/gdc/kcfinder/upload/files/60271857037.pdfIn PDF document text
    • https://lockerova.eu/admin/upload/documents/seguwebu.pdfIn PDF document text
    • http://mindatpeace.us/uploads/files/nogegafuteboxuwifir.pdfIn PDF document text
    • https://mirulunus.weebly.com/uploads/1/3/1/1/131164386/7592209.pdfIn PDF document text
    • https://ritefebeg.weebly.com/uploads/1/3/5/3/135316582/bokurituta.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/9ce401e98401300248bcf8efb669dd16/wupugew.pdfIn PDF document text
    • https://thegioidongphuc.net/ckfinder/userfiles/files/9892350635.pdfIn PDF document text
    • https://vuxizufekek.weebly.com/uploads/1/3/4/8/134864169/getuweb.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/a35cf350d810b510c194884f879aa251/98901334246.pdfIn PDF document text
    • https://dodivimibo.weebly.com/uploads/1/3/4/3/134305777/sejiwitu-mutetu.pdfIn PDF document text
    • https://lokorufutabejo.weebly.com/uploads/1/3/4/7/134760524/3266648.pdfIn PDF document text
    • http://safakkereste.com/kcfinder/upload/files/zororufim.pdfIn PDF document text
    • https://animalplus.hilariousworld.com/nouvelles/files/dulemuwidejenobubabujemug.pdfIn PDF document text
    • https://povemiloten.weebly.com/uploads/1/3/4/6/134608376/5793408.pdfIn PDF document text
    • https://buvojitode.weebly.com/uploads/1/3/4/6/134630820/ziluzetexud.pdfIn PDF document text
    • http://www.chatanakonci.cz/userfiles/file/14917281658.pdfIn PDF document text
    • https://pmb.unimal.ac.id/assets/plugin/kcfinder/upload/files/wodewubowifoves.pdfIn PDF document text
    • http://www.waheedullahauto.ae/admin/kcfinder/upload/files/nerolodajezizosor.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1623a7290a008b---nizorofidewarabafiviteni.pdfIn PDF document text
    • https://dakitejowavuri.weebly.com/uploads/1/3/4/6/134669034/d692b666.pdfIn PDF document text
    • https://loheb.co.za/XSRYdR1H?utm_term=libros+de+auditoria+administrativa+pPDF link annotation
    • http://job.nspu.ru/ckeditor/kcfinder/upload/files/36871738801.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 extracted file (font_00_sfnt_off00046f13.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off00046f13.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00046f13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x46F13 27028 bytes
SHA-256: 24e930fc18835ca1a9180beec69bd5d9b0bfdd45136cc12f76647d14318f776a
font_01_sfnt_off0004b09f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B09F 10768 bytes
SHA-256: 3a4e39062510c0f54f764c5a325e3e51273c14aaecf7d6ea167d589907418ebc
font_02_sfnt_off0004c939.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C939 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1