Malicious PDF — malware analysis report

Static analysis result for SHA-256 7826865a4200213f…

MALICIOUS

PDF

89.7 KB Created: 2021-11-16 14:28:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-16
MD5: 47b1f0a5c2995c0d528ccd57048ce0f3 SHA-1: c1afa33e86ecf145ffef8b0294ab2a34ce9ea6e4 SHA-256: 7826865a4200213fe7a5a7e16cb84eedd9c17426ec182861bef8e9a4fc601b71
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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 https://rwd.webseo.tw/upload/files/nawiwawefawojabujoruli.pdf In PDF document text
    • http://billedbutikken.dk/articlefiles/file/99952684639.pdfIn PDF document text
    • https://primer-spb.ru/files/files/dunusudesijomapibujomefar.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/27kni70ms2u6m0oeth1uujfa45/78241473061.pdfIn PDF document text
    • https://fruitssupplier.com/app/webroot/img/files/vitotirizaxuvafopo.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/8b254c00e1d7a41cf7f0d7fdf6bd433a/risadejunuge.pdfIn PDF document text
    • http://chulatutoracademy.com/chulatutor/ckfinder/userfiles/files/91767542236.pdfIn PDF document text
    • http://dinskayarealty.ru/media/file/dalov.pdfIn PDF document text
    • http://tygodnikzuzlowy.pl/ckfinder/userfiles/files/wapijub.pdfIn PDF document text
    • https://retrofitoman.com/ckfinder/userfiles/files/rolesomaxelugo.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1618ec05d1f99b---98620352375.pdfIn PDF document text
    • https://atputasbazes.lv/images/userfiles/files/fefawazutanasemedasigujex.pdfIn PDF document text
    • https://ykitraders.com/UserFiles/file/jawuzabaw.pdfIn PDF document text
    • https://petikdaun.com/contents/files/mitekesilaravarut.pdfIn PDF document text
    • http://dobrejaja.com/Upload/file/rupibobopopawo.pdfIn PDF document text
    • https://jxlmedu.com/file/files/20210906_020428.pdfIn PDF document text
    • https://babetravelling.com/ckfinder/userfiles2/files/losogorinewus.pdfIn PDF document text
    • https://balatonfurediallatorvos.hu/userfiles/file/85600944241.pdfIn PDF document text
    • http://kaymccarthy.com/immagini/file/47564639714.pdfIn PDF document text
    • http://alianzablue.com/aym_image/files/51259605988.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16182a8b1022ef---98965167213.pdfIn PDF document text
    • http://ahzgbh.news-read.com/upload/files/katajikumakudixupidoga.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16169bf091e783---lojodil.pdfIn PDF document text
    • https://anthonygillant.com/userfiles/file/bagupir.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/UsNeCLCzgYg/uplcv?utm_term=the+distance+between+two+townsPDF 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_off0000fc83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC83 10508 bytes
SHA-256: 36f040643042c9d4609b3a218df161d969f40a290ccc3183790af39416a2874d
font_01_sfnt_off00011478.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11478 16540 bytes
SHA-256: 45015263e28dbf00792e0fa83ae0fb9123af5110209f191c00797c49350166ef
font_02_sfnt_off00012b99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B99 17428 bytes
SHA-256: 31a5e5683953181c67d35a64ab5f95520a13e484fd77d3e5535d83688d788aef