Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3bbe35900eddea4…

MALICIOUS

PDF

71.6 KB Created: 2021-08-19 03:35:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 04e2111de2cf8616bedf2c5e958317de SHA-1: 0f7e6baf4904727e6d5dc266fce910d55654eeba SHA-256: d3bbe35900eddea410886494e78a4c4532f6bb9a24db3658be99996a251da164
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many hosted on compromised or disposable domains, suggesting a phishing or malware distribution attempt. The heuristic firings indicate a link farm strategy and ML classification of maliciousness. ClamAV also detected this file as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6947

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://k-souz.com/userfiles/file/57319214757.pdf In PDF document text
    • https://ferado.vn/userfiles/file/83008010690.pdfIn PDF document text
    • http://imhyuk.com/imhyukeditor/userfile/file/56086131125.pdfIn PDF document text
    • https://himanshikitchen.info/viking1/uploads/files/74753154253.pdfIn PDF document text
    • http://mackyz7automotive.com/js/upload/files/wolawefiku.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/ad5hhugtaerh6kl8c5o1kbia44/91864333705.pdfIn PDF document text
    • http://air-ned.com/uploads/files/rojisarogakezozikeluf.pdfIn PDF document text
    • http://clairerolo.com/userfiles/file/67917469552.pdfIn PDF document text
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/b8966d181164cf6c8e6ecaa85f019477/68300811537.pdfIn PDF document text
    • http://www.benyowsky.com/resources/files/54117171054.pdfIn PDF document text
    • http://yjccnc.com/upload/files/fowafumanominolupolinogo.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/8f24qrpp6k4jgueipfjan13uc5/figukisas.pdfIn PDF document text
    • https://mtestbd.com/assets/uploads/files/pukijidexuke.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092404a8b836---voxugejezogopipagopupaze.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/db1b85a837f7af2c708722cb73bd8743/32540171063.pdfIn PDF document text
    • https://hijaustabilo.com/contents//files/wikejekasosilisem.pdfIn PDF document text
    • http://oletrans.sk/editor_uploads/files/13919223004.pdfIn PDF document text
    • https://www.pepinieres-gey.fr/ckfinder/userfiles/files/nobiwixebeme.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/edv3hqpu8t66gcu7nvf4d4bb92/pinikuma.pdfIn PDF document text
    • http://mkconline.com/landmark/ckfinder/userfiles/files/43978352639.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/ef516a20bcca6cb40baeb7813a873532/5682803267.pdfIn PDF document text
    • https://sanidom.pl/img/file/ledepiwezexusitojidi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=sample+essay+for+financial+need+scholarshipPDF link annotation

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