Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb88f0f357deea8a…

MALICIOUS

PDF

186.1 KB Created: 2022-03-12 01:47:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-05-09
MD5: 5c1ed36e6a28571846fcc6944ec4c7c2 SHA-1: ca803246f624f36dcd697f6f6477119b840f2202 SHA-256: cb88f0f357deea8ae1844f281394d3df971890c74bc049e6a53782b95035b850
216 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.7590

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
  • Viral-video clickbait PDF links to suspicious host critical SE_VIRAL_VIDEO_CLICKBAIT_LINK
    Document uses viral/leaked-video lure text and links to a suspicious disposable-looking web host. This is a clickbait/traffic-scam carrier shape rather than a benign PDF link.
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. 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://xn--80aatg4aaaddkhfhbf3evf.xn--p1ai/ckfinder/userfiles/files/61935080858.pdf In PDF document text
    • http://tehla.eu/userfiles/file/10412988763.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/16206f389576a7---bijoxelexekepibonezifu.pdfIn PDF document text
    • http://lustigersteirer.at/userfiles/file/79186413694.pdfIn PDF document text
    • https://aslimitada.com/userfiles/file/fubebowegufit.pdfIn PDF document text
    • http://harc-ias.vn/Images_upload/files/bobabilu.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/27rcq3nt1qsps2nbgdaf1uaiv0/zasegedekasiv.pdfIn PDF document text
    • http://do-construction.ch/admin/kcfinder/upload/files/47850990452.pdfIn PDF document text
    • https://samsungklima.net/upload/ckfinder/files/84649944657.pdfIn PDF document text
    • https://castrolraceway.global-powersystems.com/~globa859/castrolraceway/userfiles/file/wiveno.pdfIn PDF document text
    • https://aleksandarshoes.com/storage/files/8123804889.pdfIn PDF document text
    • http://aock.kz/app/webroot/js/kcfinder/upload/files/66837435509.pdfIn PDF document text
    • http://gysanya.com/upload/file/220206122420767519dcw7ng3y4ee1.pdfIn PDF document text
    • https://cicadit.ro/UserFiles/file/jiximibufi.pdfIn PDF document text
    • http://gima.ge/admin/ckeditor/ckfinder/userfiles/files/midekazukataluneb.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16204a082b5b26---zerizudesevusas.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/14310737766.pdfIn PDF document text
    • http://dkmmotor.com/files/userfiles/file/84208876044.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1622817a97d87d---dironamukugirevovikizis.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/16225960b66512---vididavojosarepubomekubo.pdfIn PDF document text
    • http://palirna-frydek.cz/uploaded/file/36650287773.pdfIn PDF document text
    • http://sreecollegeofpharmacy.com/admin/kcfinder/upload/files/rojas.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/161f8b84ba1abe---zevuxonefewed.pdfIn PDF document text
    • https://sekeret.com/kcfinder/upload/files/16249124597.pdfIn PDF document text
    • https://bdaudit.topham.ro/userfiles/file/nadafeketolulijajiwi.pdfIn PDF document text
    • http://delfosventures.com/userfiles/files/suzuroneranet.pdfIn PDF document text
    • https://atahca.pt/atahca_gestor/kcfinder/upload/files/92649592955.pdfIn PDF document text
    • https://naves.cz/res/file/gamiparuzi.pdfIn PDF document text
    • https://cyklo-wellness-penzion-palice.cz/content/fowobegepeboridedutadejin.pdfIn PDF document text
    • http://oreoltour.ru/sites/default/files/file/75683676980.pdfIn PDF document text
    • https://mifuj.co.za/XSRYdR1H?utm_term=pdfkit+html+to+pdf+nodejsPDF link annotation
    • http://spartaksedlec.cz/spartaksedlec/userfiles/file/vuzatififewedibazunegaxa.pdfIn PDF document text
    • https://bdaudit.topIn 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_off00027778.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off00027778.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00027778.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27778 18920 bytes
SHA-256: 3d5cc5072058839493c7126bb9d63221095a666a807ea97dacd3adc4eb2693db
font_01_sfnt_off0002a940.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A940 10724 bytes
SHA-256: 96d6a8a80a97e920b9fd5b77d8bcbf822d54f900daa9bee92f73cb868d3c9d03
font_02_sfnt_off0002c1a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C1A1 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9