Malicious PDF — malware analysis report

Static analysis result for SHA-256 4af42e3eb3f680fe…

MALICIOUS

PDF

84.5 KB Created: 2021-10-11 08:44:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-06
MD5: b50ca5396cf6e642766df58600f30fe8 SHA-1: 693da1a2831dbf8cbbc6bd838acfda7fc0978497 SHA-256: 4af42e3eb3f680feead09a4ea16357d200161ceee9605f1b22954b99012c88fb
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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://infrive.ru/uplcv?utm_term=understanding+how+others+misunderstand+you+pdf PDF link annotation
    • http://ucg-eg.com/userfiles/file/betenepe.pdfIn PDF document text
    • http://fcraregistration.com/UploadedData/file/kowapeledegu.pdfIn PDF document text
    • http://seychelles-resort.com/images/blog/file/zexipo.pdfIn PDF document text
    • https://arabadvertise.com/userfiles/files/mabemojanil.pdfIn PDF document text
    • http://jessie.vn/images/ckeditor/files/54353787425.pdfIn PDF document text
    • http://ventilyatsia-v-sochi.ru/ckfinder/userfiles/files/53129776579.pdfIn PDF document text
    • https://rintrans.com/files/96749821131.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/16141191c02d7c---figila.pdfIn PDF document text
    • http://skrabl.pl/www/rpbd/fck/file/bukavutobavanuso.pdfIn PDF document text
    • http://datcat.vn/2018/file/labubuwepesit.pdfIn PDF document text
    • http://delfosventures.net/userfiles/files/dokisewifegonesevoligej.pdfIn PDF document text
    • https://mtmnetwork.net/uploadEditor/files/fimozivenapa.pdfIn PDF document text
    • http://www.pataniforum.com/admin/jquery/ckfinder/userfiles/files/nuwakenopal.pdfIn PDF document text
    • http://language-coach.pl/uploads/files/ruruwetas.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/d8cc1c4218ca208a8787a033a8b24dc5/zazemisapanaluduwizezodu.pdfIn PDF document text
    • http://antitumor.org/filespath/files/20210918004618.pdfIn PDF document text
    • https://anpheatingandac.net/nbloom/fckuploads/file/63511832471.pdfIn PDF document text
    • https://sluganarodu.org/userfiles/files/rawel.pdfIn PDF document text
    • https://nulifeus.com/~nulife/userfiles/file/25523605075.pdfIn PDF document text
    • https://noriupapildu.lt/ckfinder/userfiles/files/tamebixuzer.pdfIn PDF document text
    • http://checopharma.com/upload/files/taziwowelimurates.pdfIn PDF document text
    • https://marcuspietrek.de/MARCUS/files/file/60634580162.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/78a2ee2fe2ff61266e94a40575be6da0/lifufavamekose.pdfIn PDF document text
    • http://notar-frings.de/userfiles/file/40750494348.pdfIn PDF document text
    • http://www.musicboxpiano.com/contentfiles/fevudogu.pdfIn PDF document text
    • https://artgallery.devctn.com/ckfinder/userfiles/files/tapagobebisudoza.pdfIn PDF document text
    • https://kemxoi.vn/app/webroot/files/images/pages/files/72122032740.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 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_off0000df57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF57 19492 bytes
SHA-256: 33f53dd9180b6f49dcf3e55bc48c729f5b5a2908f135bbe38a614ecb529c5e9d
font_01_sfnt_off000111ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012a05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A05 11208 bytes
SHA-256: cfe9a056e127caa3a4db2a54d2442fc9045dce92a6359af8040a7995a25ff18f