Malicious PDF — malware analysis report

Static analysis result for SHA-256 26f81a5f7765a94a…

MALICIOUS

PDF

514.5 KB Created: 2022-03-11 11:04:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-07-18
MD5: f1b5a58c07115457fda0fb12af34a405 SHA-1: 2598afdec4f2184dee4b7ea66c162adddb5fc5df SHA-256: 26f81a5f7765a94a3872dfd39c4e9dd66b66b3fae2c62b26244d3b598f225ad7
136 Risk Score

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3788

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 http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16225997b96a40---zaxozofunibomekanezuxoza.pdf In PDF document text
    • http://mecateengenharia.com.br/ckfinder/userfiles/files/527285093.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1622003b111132---sixofizumibor.pdfIn PDF document text
    • http://zeguvietnam.com/uploads/ckfinder/files/repudedusuvunuwirope.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/21e93804ca4980e5bec271766e318562/xepevuzedopegimetobarase.pdfIn PDF document text
    • http://kbidc.kr/upload/editor/file/1645974752.pdfIn PDF document text
    • http://kondicionery-domodedovo.ru/upload_picture/file/88492623474.pdfIn PDF document text
    • https://www.naturecare.com.au/kcfinder/upload/files/32981202870.pdfIn PDF document text
    • http://zamdq.com/filespath/files/20220204041032.pdfIn PDF document text
    • http://elixiriso.com/kcfinder/upload/files/48732755192.pdfIn PDF document text
    • https://apra.pl/files/file/45658995213.pdfIn PDF document text
    • http://bobas24.pl/Upload/file/rijixedofibipadefoke.pdfIn PDF document text
    • http://ridonhennet.eu/admin/kcfinder/upload/files/vinufotizu.pdfIn PDF document text
    • http://nineslash.com/user_file/file/20133096791.pdfIn PDF document text
    • https://etevent.itweald.com/uploads/files/620615f93f7cc.pdfIn PDF document text
    • http://banderlogclub.ru/kcfinder/upload/files/dajepavarobosaz.pdfIn PDF document text
    • http://autodilygood.cz/files/file/divuxerubalasafipumegat.pdfIn PDF document text
    • https://sthouseluxury.com/upload/files/61202445086.pdfIn PDF document text
    • https://easy2ticket.com/upload/files/43333788112.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1621a793c5fbbc---84925669100.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/162098aa2b7e34---8594247965.pdfIn PDF document text
    • https://vongtaytramhuong.vn/upload/files/70208572924.pdfIn PDF document text
    • https://supremeroi.com/FCKeditor/file/vefonurezivisov.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/040728463038.pdfIn PDF document text
    • http://spartaksedlec.cz/spartaksedlec/userfiles/file/dowuzugizininaveve.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/081416414732.pdfIn PDF document text
    • http://agro-partner.com/Image/files/60259423932.pdfIn PDF document text
    • http://vladjurnalist.ru/archive/file/fejaxisasudi.pdfIn PDF document text
    • https://mehreganimaging.ir/images/upload/files/30681875421.pdfIn PDF document text
    • https://ngusacdon.com/upload/files/29130773838.pdfIn PDF document text
    • https://thietbivesinhanhhuy.com/asset/files/busijijosupegulabun.pdfIn PDF document text
    • http://ubest.ru/images/file/92938465256.pdfIn PDF document text
    • https://divinenine.net/userfiles/file/nuselewavenele.pdfIn PDF document text
    • http://hongsung114.com/files/fckeditor/file/63750703099.pdfIn PDF document text
    • http://www.corazondelsol.es/ckfinder/userfiles/files/zenuwi.pdfIn PDF document text
    • https://faustgottes.ch/upload/files/83705078008.pdfIn PDF document text
    • https://www.v-investor.ru/kcfinder/upload/files/vuwujutewepixen.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/162122af55ca0c---10325683356.pdfIn PDF document text
    • http://sumisaedu.com/FileData/ckfinder/files/20220305_126F352EF4148EB7.pdfIn PDF document text
    • http://aarhuskortet.dk/images/file/47811055209.pdfIn PDF document text
    • https://flyingfish-stay.com/userfiles/file/34900470683.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/161f91663cb4a9---87099383138.pdfIn PDF document text
    • https://tevav.co.za/XSRYdR1H?utm_term=veterans+day+coloring+sheets+printablePDF 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_off000793ae.bin)
    +1 more URL(s)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000793ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x793AE 20544 bytes
SHA-256: ca096732cfca9ff86d8104e4023f3a5234559b294b9461af8ef0e44760c8119e
font_01_sfnt_off0007c925.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C925 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9
font_02_sfnt_off0007e047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E047 11016 bytes
SHA-256: 13a016a99088b8eb609e78aaf501400bdad483eb274b6eef4ef1f0672609bf2a