Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d3b1ce9f8d3d091…

MALICIOUS

PDF

76.2 KB Created: 2021-08-06 23:17:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 1f7cec5c5aa49bb36ea419f2f2b3f59d SHA-1: d657631ff3024880d17c204f4e42e8de85f45d5e SHA-256: 0d3b1ce9f8d3d091c3ef8d4e62fa0f359093cfc1a8ef7b5a51239581a1912a5e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains a link farm pointing to multiple domains, many of which appear to be compromised WordPress sites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted from this sample, but the structure and URL patterns are indicative of a malicious PDF designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9211

Heuristics 5

  • 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
  • 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://www.syria-report.com/sites/all/libraries/ckfinder/userfiles/files/zewefas.pdf In PDF document text
    • https://webmenuplus.com/images/file/43590575837.pdfIn PDF document text
    • http://sanfrancescovet.com/userfiles/files/72812992939.pdfIn PDF document text
    • https://swalaya.in/userfiles/file/18872171572.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/27qifp8uspmr0t9dhom7c4ag2c/gukazif.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087653184bfe---19803244957.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/0kdgt53q2o003kf4pfkmu7qvgi/tusabanupomemubud.pdfIn PDF document text
    • http://regimhotelierbucuresti.com/images/userfiles/baxov.pdfIn PDF document text
    • http://ncabhsa.com/clients/875427/File/deraboxiratamo.pdfIn PDF document text
    • http://hotelpenza58.ru/ckfinder/userfiles/files/42114417076.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a3b6fcf0ee3---35508765839.pdfIn PDF document text
    • https://247hvac.ca/fabulous1/uploads/files/88221041502.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c108b456d18---67830194069.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160736275c1bd8---53210849376.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fd00bee0607---jegegawumurubi.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/160871af16307e---12985079995.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608a80b05e379---57685383879.pdfIn PDF document text
    • http://fkhd.cz/data/img/nideven.pdfIn PDF document text
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/e2bcb3026a2dfbc753c9c22be9e5ba76/mutesamizaso.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/c6bfc2da4c228dddadfbb853f8fc58bf/dibosetobodigig.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a8d8eedd705---44663605751.pdfIn PDF document text
    • http://cukrarska-vyroba.cz/UserFiles/File/dizejixaputisorunarexuwuj.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086465b4f1df---38779337916.pdfIn PDF document text
    • https://pypconsultores.mx/userfiles/file/mogexuzajal.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=ada+douglas+wetherillPDF link annotation

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