Malicious PDF — malware analysis report

Static analysis result for SHA-256 f87d96a646bb78bc…

MALICIOUS

PDF

76.1 KB Created: 2021-09-12 02:01:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-16
MD5: 974483073ae86cf2e54f187efaa2ce55 SHA-1: cb218e9f9deb5fe5cd5194bfb81eaf539ba24d33 SHA-256: f87d96a646bb78bc360392deb991ea663130f87a8f6f19ff93c7e374b764eaff
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://anhuizhkj.com/upload_fck/file/2021-9-1/20210901062149930886.pdf In PDF document text
    • http://wib24-admin.de/uploads/file/dazubumowidabilubudivijel.pdfIn PDF document text
    • http://kangshi-you.com/uploads/files/202109081801363927.pdfIn PDF document text
    • http://prunay-en-yvelines.fr/ckfinder/userfiles/files/99423512577.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613946d998e22---46050481399.pdfIn PDF document text
    • https://porfic.com/fotos/file/tafuzudezopege.pdfIn PDF document text
    • http://kargiskola.ge/myadmin/ckeditor/ckfinder/userfiles/files/90225326918.pdfIn PDF document text
    • http://rheumatology.institute/upload/content/file/66080032760.pdfIn PDF document text
    • http://hurtowniagrafit.pl/userfiles/file/gafujezixizuravexufebetis.pdfIn PDF document text
    • http://descanso.verareyes.com/ckfinder/userfiles/files/52631531647.pdfIn PDF document text
    • http://biomehl.com/images/content/files/lixod.pdfIn PDF document text
    • https://jecoexports.com/ckfinder/userfiles/files/doxegevuwuzidal.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d20d3a9562---34179141269.pdfIn PDF document text
    • http://svenskafik.se/uploads/fckeditor/file/mefumi.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130942d78c1a---2082166528.pdfIn PDF document text
    • http://radio-salsa.com/php/rs/filesupload/file/698325792.pdfIn PDF document text
    • https://mklaassen.nl/images/file/78967961035.pdfIn PDF document text
    • http://xy-interior.com/uploads/files/202109120636165027.pdfIn PDF document text
    • https://minhvuongthuphap.com/upload/ck/files/22298242878.pdfIn PDF document text
    • https://mysilo.com/upload/ckfinder/files/zixip.pdfIn PDF document text
    • http://harckocsik.hu/userfiles/file/donevejokuvowoxofoxo.pdfIn PDF document text
    • http://bk-plus.at/userfiles/files/86887127913.pdfIn PDF document text
    • http://dvg.asia/ckfinder/uploadfiles/files/3646933135.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=call+of+duty+mobile+mod+apk+unlimited+cod+points+downloadPDF 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 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_off0000c49e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC49E 11244 bytes
SHA-256: 4071891423f30b0d0aefd431946baecfaec9c5ebe6aa9165dc19ae71dc44efef
font_01_sfnt_off0000dee5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE5 16884 bytes
SHA-256: 14cf5f883e6b43e1d56bece58f0dfc27a96d0ec4fdbf792933c07f04d0473c43
font_02_sfnt_off00010aba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ABA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1