Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4fbdedf0b66f394…

MALICIOUS

PDF

80.9 KB Created: 2021-11-19 05:18:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-07-02
MD5: 3b89e367259b262cc4e85140494d00a2 SHA-1: f8c5bbd62eb467d45e72dc551aaed747f424b7c5 SHA-256: a4fbdedf0b66f3941f8a44651401026c6870d4f7cda081e4245bbb1cbcaed137
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • 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://pantipplaza.com/userfiles/file/doleba.pdf In PDF document text
    • https://rowsontw.com/shopadmin/upload/files/29661485898.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1616f29d08fee5---kuterusikarodinuzes.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/zofupeziz.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16185117b917b0---vodadamesumurina.pdfIn PDF document text
    • http://smepil.com/ckeditor/userfiles/files/zexiribufozidejufano.pdfIn PDF document text
    • http://lukoilmarine.com/ckfinder/userfiles/files/guviwajikebaz.pdfIn PDF document text
    • http://alvitraders.com/files/kusunuximeso.pdfIn PDF document text
    • https://twinscooking.nl/twins/userfiles/file/73363739672.pdfIn PDF document text
    • http://debiut3028.fun4two.pl/uploads/assets/file/98350052329.pdfIn PDF document text
    • https://kop-trans.pl/uploads/userfiles/files/pinexefapumedaxud.pdfIn PDF document text
    • http://cellesekorea.com/ckupload/files/632769040.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614416df3576c---92907414315.pdfIn PDF document text
    • http://basumati.com/app/webroot/ckfinder/userfiles/files/74326768439.pdfIn PDF document text
    • http://malir-naterac.info/UserFiles/File/10752605583.pdfIn PDF document text
    • http://www.radanhorse.com/resource/files/galobewiv.pdfIn PDF document text
    • https://gallerylingard.com/uploads/file/94327545742.pdfIn PDF document text
    • https://pemaboutiquehotel.com/assets/userfiles/files/wexavuwixemefan.pdfIn PDF document text
    • http://z-i-f.ru/userfiles/file/kezadi.pdfIn PDF document text
    • https://infotechsystemsonline.com/ital/www/img/file/86194913515.pdfIn PDF document text
    • http://i-daa-wl.de/userfiles/wibarimod.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/1617e4d5636618---96887688383.pdfIn PDF document text
    • http://studiosiciliani.eu/userfiles/files/bekewuneluwuba.pdfIn PDF document text
    • http://gnox.vn/upload/files/jemikutaxidaviradigud.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/7xhmvLXWVJc/uplcv?utm_term=all+about+capricorn+manPDF link annotation
    • http://louisiana-arts.org.s150269.gridserver.com/siteuploads/editorimg/file/torolowoke.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 extracted file (font_00_sfnt_off0000d8c2.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0000d8c2.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C2 17940 bytes
SHA-256: f7853ef5514e5e77b3c9dede2ae3939b8fb7bb0c89573655dd1410c2b4909ba7
font_01_sfnt_off00010744.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10744 16540 bytes
SHA-256: 45015263e28dbf00792e0fa83ae0fb9123af5110209f191c00797c49350166ef
font_02_sfnt_off00011e6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E6A 10456 bytes
SHA-256: b997aa953a4ae4680b19f29a798fa7fe06ddbce20f6749e4765694ec84fcc735