Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8790c8c415423d3…

MALICIOUS

PDF

440.1 KB Created: 2022-03-07 16:07:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-16
MD5: 53e2b5cdfcc297a55407e0bd555cae72 SHA-1: 0adc7309e26ee677abbecc2fe9e8104d54de8980 SHA-256: f8790c8c415423d30e823e1c2e1829297d00ed4a855f4f5644e9441833ec2023
144 Risk Score

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4050

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=sherlock+holmes+books+free++sinhala PDF link annotation
    • http://6461737.ru/upload/files/xuzunobinawutevusogirimox_1645430361.pdfIn PDF document text
    • https://zippy-inc.com/app/webroot/userfiles/files/vumow.pdfIn PDF document text
    • http://thietbianninh188.com/uploads/files/71081870854.pdfIn PDF document text
    • http://tzsunup.com/upload/gonub.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1620cb151b07ab---83940374493.pdfIn PDF document text
    • http://cosmosartinteriors.com/kcfinder/upload/files/42168277054.pdfIn PDF document text
    • http://st03.it/userfiles/files/jeginita.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/f774ed97c7bf02e8d36dc8d994649cb9/26531942229.pdfIn PDF document text
    • http://traiteur-ribot.fr/userfiles/file/89484990302.pdfIn PDF document text
    • https://sssmri.com/ckfinder/userfiles/files/vibajexi.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/162174cd90efb5---9050586910.pdfIn PDF document text
    • https://birutelorasin.com/contents/files/9731397645.pdfIn PDF document text
    • https://tiger-security.net/webroot/upload/files/61140126934.pdfIn PDF document text
    • https://limblength-sldf.com/userfiles/file/83458762844.pdfIn PDF document text
    • https://1000families.eu/userfiles/file/dikevozibilafaxejanuvonis.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1621bd87c1e339---duduzetufilazuwuvimu.pdfIn PDF document text
    • http://delve-cr.com/uploads/raposidilu.pdfIn PDF document text
    • https://planbmedia.hu/files/rixarumuvan.pdfIn PDF document text
    • http://arcstema.com/userfiles/files/dibunavosubib.pdfIn PDF document text
    • https://hoffenegypt.com/userfiles/file/feranivazizuwitikajojuna.pdfIn PDF document text
    • http://kungfubp.hu/admin/assets/images/files/36064935252.pdfIn PDF document text
    • http://muszosz.hu/_user/file/lesoligufigut.pdfIn PDF document text
    • http://wtmongolia.com/materials/file/99216009603.pdfIn PDF document text
    • https://dananeye.com/uploads/files/202202022313183697.pdfIn PDF document text
    • https://btsis.com/upload/ckfinder/files/xejolufa.pdfIn PDF document text
    • http://losaltos.com/wysiwygfiles/file/zeloxakasasofixenevatogu.pdfIn PDF document text
    • https://dkglobalrecruiters.com/admin/public/ckeditor/upload/files/fatezizagurala.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/ad54aedec5b4a4faf1cecec54a32dfa7/3519299273.pdfIn PDF document text
    • http://spbmedax.ru/sites/default/files/uploads/zuzodobukawefaloka.pdfIn PDF document text
    • https://cowichanmusicfestival.com/userfiles/file/zexuruxuz.pdfIn PDF document text
    • http://wagnerpc.com/userfiles/files/zawosukur.pdfIn PDF document text
    • http://wakabaeducation.com/userfiles/file/pirixugadibasug.pdfIn PDF document text
    • http://philippetardieu.com/kcfinder/upload/files/ximuwururap.pdfIn PDF document text
    • http://anais.terminarz.online/kosmetyczka/krakow/files/9307539727.pdfIn PDF document text
    • http://filmovani.eu/img-content/files/3117791935.pdfIn PDF document text
    • http://mwcapital.net/ckfinder/userfiles/files/xebenusegemagojudobevixok.pdfIn PDF document text
    • http://blackivy.pl/userfiles/file/23777533878.pdfIn PDF document text
    • http://lachambredechos.com/userfiles/file/43783862868.pdfIn PDF document text
    • http://www.ernakulamarchdiocese.org/www/js/ckfinder/userfiles/files/disusoboxi.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_off00066adc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66ADC 20236 bytes
SHA-256: aab7de0e1acfc0e5b8cf3e5dad54249ee3af9112fad2daedacfb2c1e924f36d3
font_01_sfnt_off0006a06b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A06B 10808 bytes
SHA-256: 1d56f125a44325e8049e0a9d2335c06744250c64ae94f1776fe5b78fa14dadf3
font_02_sfnt_off0006b91b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B91B 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9

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