Malicious PDF — malware analysis report

Static analysis result for SHA-256 631de620007755c2…

MALICIOUS

PDF

64.0 KB Created: 2021-09-07 10:50:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 9d00283c06a7c953c2e78e2703f6fce6 SHA-1: 6ad7b9918adc0bcd0ee31ae503e6e0f0be8aaf55 SHA-256: 631de620007755c26e0483f7076485b43bee25d20c6b0cfa4d2f29a35c7576e1
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ClamAV and exhibits characteristics of a link farm, with numerous URLs pointing to potentially compromised websites. The PDF structure and embedded URLs suggest an attempt to lure users to external sites, likely for phishing or to download further malicious content. No scripts were extracted, but the presence of multiple suspicious URLs indicates a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4986

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://napraforgohotel.hu/upload/file/mitufusawadiretazotarud.pdf In PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160cfd4c156bd3---86282659071.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160873ab9b3848---30652256960.pdfIn PDF document text
    • https://www.edmcenter.xyz/ckfinder/userfiles/files/baranamudiz.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/16118b84682f5f---91210171271.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d82dacf3626---544258529.pdfIn PDF document text
    • http://daotaoyduoc.org/wp-content/plugins/super-forms/uploads/php/files/jft6403oqi6tdl8fqv165qnpus/xuradule.pdfIn PDF document text
    • http://feg.vn/uploads/files/lulokipiwiw.pdfIn PDF document text
    • https://tidurmalam2.com/contents/files/kikexuzavoriv.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/m1hj01e4i5co55695fe51knis0/5249596162.pdfIn PDF document text
    • https://aronabritcan.com/userfiles/file/pubiterejutefewujeref.pdfIn PDF document text
    • https://comfort8889.com/upload/files/xinixujesezikoropo.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/19b3f67255f47f295a81c2ad8301131b/94752141974.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/4q7ki7mnosfept11qqq8866cj7/wixumilive.pdfIn PDF document text
    • http://pamatudarbai.lt/ckfinder/userfiles/files/11719520162.pdfIn PDF document text
    • http://thebrownsfamilyreunion2008.com/clients/81208/File/24645468657.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/n00oip540ni8cs06ov8h9uu371/31129761067.pdfIn PDF document text
    • http://lctrading-gmbh.com/ckfinder/userfiles/files/75254413303.pdfIn PDF document text
    • https://zapret-rf.org/web/img/podborky/files/92105057445.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160f8c12e2fb15---31393530022.pdfIn PDF document text
    • http://prestizhstroycompany.ru/SITE/files/editor/file/79717861830.pdfIn PDF document text
    • http://esipro.lu/userfiles/file/tijagefalaroburuwazavot.pdfIn PDF document text
    • http://zuche0551.com/upload/file/36562619577.pdfIn PDF document text
    • https://binarbaid.com/public_html/userfiles/file/mefirojubodov.pdfIn PDF document text
    • https://szallas-karpatalja.com/upload/jivaporeregugewim.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=mary%C5%A1a+pdf+knihaPDF link annotation

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