Malicious PDF — malware analysis report

Static analysis result for SHA-256 f99f8981b5fef64e…

MALICIOUS

PDF

336.2 KB Created: 2022-02-03 02:58:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-13
MD5: bb33529c9a28adc93d3bed48c748eb78 SHA-1: 8af3f28409d8eaa0b8ff4a8132356202ce2b0cfc SHA-256: f99f8981b5fef64e26795e9e96b7a1ac54788f2324fecf8a925e8855078e3181
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=appraisal+form+answers+software+developer PDF link annotation
    • http://status-go.net/gfx/userfiles/files/74263693694.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/3cad39d7bce1e8b896eb04dc87d38c87/mapofewomox.pdfIn PDF document text
    • https://www.bbmnetlicitacoes.com.br/cms/ckfinder/upload/files/bazofotixono.pdfIn PDF document text
    • http://eros-arena-reutlingen.de/eros/userfiles/file/budukobopupa.pdfIn PDF document text
    • https://merten-rozetki.su/kcfinder/upload/files/xomifigoxijejodolake.pdfIn PDF document text
    • http://pokwuttibut.com/file_media/file_image/file/nugukofinosupikerote.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615d8c0302580---97283414424.pdfIn PDF document text
    • http://zulassungsdienst4you.de/bilder/file/8561480209.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/7njnk4hchaqbgpb35op6isbp3s/dujopugujuxowitebizusux.pdfIn PDF document text
    • https://balatonfurediallatorvos.hu/userfiles/file/gopilub.pdfIn PDF document text
    • http://aexpress.lv/index/images/up/file/pozivabitesij.pdfIn PDF document text
    • http://ucinnovation.ru/admin/ckfinder/userfiles/files/90509163755.pdfIn PDF document text
    • http://mecaniquekd.ca/upload/file/sulisutukelaj.pdfIn PDF document text
    • http://tingyi-bnb.com/CKEdit/upload/files/xojusilonemegebasar.pdfIn PDF document text
    • http://marleenjansen.nl/images/uploadfiles/13722382491.pdfIn PDF document text
    • http://mestan.by/images/file/74527427324.pdfIn PDF document text
    • https://austdoorcaocap.com/upload/files/degodedod.pdfIn PDF document text
    • https://sukienmiennam.com/userupload/files/12399645388.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1617f0dad59eaf---5377930803.pdfIn PDF document text
    • https://mcsfood.com/images/file/firazimudiwerebanetagiz.pdfIn PDF document text
    • http://xn--b1agpbmdtf.xn--p1ai/upload/file/masowebitesijobuk.pdfIn PDF document text
    • http://turkuazhost.com/calisma2/files/uploads/77515283952.pdfIn PDF document text
    • http://jadeite.ru/images/file/gulijujidugizesilum.pdfIn PDF document text
    • http://wienbildarchiv.com/upload_files/files/soxafagubagatelag.pdfIn PDF document text
    • http://sibstroiexp.ru/userfiles/file/pofudifalaxodemos.pdfIn PDF document text
    • https://baglab.pl/galeria/file/22126949054.pdfIn PDF document text
    • https://scorestop.com/uploads/files/7294750563.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160f8515f9f778---sopuwijatanogelujagid.pdfIn PDF document text
    • http://ctkupavna.ru/upload/file/38587090970.pdfIn PDF document text
    • https://jahanchart.ir/data/files/file/mudam.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/16170e0546b2a4---71400045499.pdfIn PDF document text
    • https://adm.ativo.com/js/kcfinder/upload/files/52838749140.pdfIn PDF document text
    • http://eggtesting.com/admin/uploads/file/54460163593.pdfIn PDF document text
    • http://khotelmarket.com/FileData/ckfinder/files/20211116_3B4D68DB27F91A62.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/5b4130a94d0f01d53f73b799bd828ecf/8731159026.pdfIn PDF document text
    • http://h-n-s.net/userfiles/file/98396798148.pdfIn PDF document text
    • http://vanlysecurity.vn/vanly/album/files/sugudibob.pdfIn PDF document text
    • https://tenutaedone.com/filesUploads/file/rekuzikorutinizuluto.pdfIn PDF document text
    • https://mimpishio1.com/contents/files/77938859992.pdfIn PDF document text
    • http://biopole-clermont.com/uploads/gestion_contenu/files/25375428693.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_off0004d4c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D4C4 16740 bytes
SHA-256: 6bf4dbebca1594fb9f2c1606fa4d79732a79f0fab53eae442514a68a184b5fb8
font_01_sfnt_off00050083.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50083 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9
font_02_sfnt_off000517a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x517A3 10792 bytes
SHA-256: 5e79fe901305e85104f52e634fb238a12a32efc294e06bcdb450c5d01c2a004a