Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5d473b8c8552407…

MALICIOUS

PDF

100.1 KB Created: 2021-09-02 12:48:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-27
MD5: 2594b3395f5602df8c7f1d1030f12753 SHA-1: c1f411f84cfd7c7b89a4401c2028b251a90d88ea SHA-256: c5d473b8c8552407cfbafd81a835010ec2d5e12d4beb47e6e395cd2b78abcbf4
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9800

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 https://alarouba.com/ckfinder/userfiles/files/5676754205.pdf In PDF document text
    • https://cantarefides.ro/admin/userfiles/file/41211407603.pdfIn PDF document text
    • http://npi-management.com/ressource/site-image/files/4940631770.pdfIn PDF document text
    • http://epoetryworld.com/clients/53741/File/mimotox.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ee0ac28e184---86528084593.pdfIn PDF document text
    • http://cp-1.ru/userfiles/files/repuwoposotibolapawerawo.pdfIn PDF document text
    • https://slide-bearing.com/d/files/13805212659.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160f6dd2fa5d1c---94295079892.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16086439d5509d---88239139813.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160cad8f4788e7---jaxazarokonedupenafavevav.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160991844cf41b---zozetivazidabafogalolune.pdfIn PDF document text
    • https://thewaves.net/wp-content/plugins/super-forms/uploads/php/files/57v1ndmtjgnggo1gnduj7i0kn1/43315431306.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1607482e907fb8---moxux.pdfIn PDF document text
    • https://shoppingplanet.ro/ckfinder/userfiles/files/rirubek.pdfIn PDF document text
    • https://biocoils.com/img/file/voxapimezapebisimib.pdfIn PDF document text
    • http://elitsatodorova.com/uploadfiles/file/17681749412.pdfIn PDF document text
    • http://landpas.pl/upload/file/23587790392.pdfIn PDF document text
    • http://rothemtour.com/FileData/ckfinder/files/20210824_3ACF905CFAB7EA99.pdfIn PDF document text
    • http://phrabat.net/UserFiles/File/bewitasaxeferegatod.pdfIn PDF document text
    • http://liyangah.com/Upload/file/zufimixuwidamokaxezoxofot.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/81de3m0n67ai0frrcj3dekq5j2/51976388901.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1ecf430580---40370135203.pdfIn PDF document text
    • http://wisdomtours.net/upload/file/38100379266.pdfIn PDF document text
    • http://lingeriedediva.com/UploadFile/file/2021082108322473499.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097849ea0e0b---mefabarumezol.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16103cc5cf3f9a---fudalasebagezaganixab.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=reflective+writing+examples+pdfPDF 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_off00011c90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C90 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000134a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134A2 20208 bytes
SHA-256: 04f27733a6d2ccc27a8b4c88fac55c42f1d533bd906c9020955af665a7977867
font_02_sfnt_off00016903.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16903 11144 bytes
SHA-256: 80dee4dc64ff7bf2f68e97db27e8612f62cb7e61f3c089d856a41f5b8ad4646b