Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d81e250caa49ce5…

MALICIOUS

PDF

96.6 KB Created: 2021-11-08 13:16:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-18
MD5: 9d67b0336b46c466fa8a94d8b83b7395 SHA-1: a8c9b86dc8d234fa2d16c6473017653221bce95c SHA-256: 5d81e250caa49ce5f16a6d9f4c8e6f7a97f1927fdb6353ac00eeb802a063761a
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://fge-service.com/userfiles/file/58457516799.pdf In PDF document text
    • http://xn----7sbakif2a3azdub.xn--p1ai/admin/ckfinder/userfiles/files/zaledibemopurenafufol.pdfIn PDF document text
    • http://phone-server.com/userfiles/file/nazonolabasuvasepi.pdfIn PDF document text
    • https://a-guskov.ru/uploads/files/weweze.pdfIn PDF document text
    • http://svenskafik.se/uploads/fckeditor/file/lijeguzidomuruliruveg.pdfIn PDF document text
    • https://idealist.ro/userfiles/file/kuvuja.pdfIn PDF document text
    • http://dragoniresorts.com/userfiles/32817444918.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/01612952ba7e88607fcc5c749639cc32/nizoxuj.pdfIn PDF document text
    • http://etenindex.nl/images/uploads/pitopisenoxivafiturizis.pdfIn PDF document text
    • http://domoticasociale.it/immaginiNewsletter/file/41123262432.pdfIn PDF document text
    • https://urbanlivin.lu/userfiles/files/nirovibaz.pdfIn PDF document text
    • http://eastcoastbiker.de/sites/default/files/file/xawilutufavirenofafodiv.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/67187693515.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/qrmfe99rkv9g82qco8sk5h82l8/kuribekuf.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/u3vm9109ff3fq0tehpfvoclo46/zupututexeb.pdfIn PDF document text
    • https://myphambambi.com/webroot/img/files/vagawijowedukonivoziko.pdfIn PDF document text
    • https://windscrm.net/files/file/xeregalerabipoxumebe.pdfIn PDF document text
    • http://sergeybazarov.ru/file/51032357059.pdfIn PDF document text
    • http://viprealestatebrokers.com/userfiles/files/37610042851.pdfIn PDF document text
    • https://vsetinrally.cz/userfiles/file/29542487383.pdfIn PDF document text
    • http://le-bouquet.be/userfiles/files/30789667069.pdfIn PDF document text
    • https://immo-macedo.lu/userfiles/files/80494562888.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/d452f7661533dc3b60e4d6d615c5b66c/gegupojemileduzofavub.pdfIn PDF document text
    • https://oncallanatomist.com/ckfinder/userfiles/files/dajebokupikusew.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/1hHberoKktI/uplcv?utm_term=esl+comments+for+readingPDF 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_off0001141a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1141A 16540 bytes
SHA-256: 45015263e28dbf00792e0fa83ae0fb9123af5110209f191c00797c49350166ef
font_01_sfnt_off00012b40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B40 10800 bytes
SHA-256: 0a29aedb2d13f66b07b7a067b218214d528069fb74c53c2809ca4f6c55db6af4
font_02_sfnt_off000143da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143DA 18972 bytes
SHA-256: 6743eddd5a9fd6cf5b88bb8b4f2026ea6800e830b9f3454de25cf475d4866f3f