Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a65260ef90bb3bb…

MALICIOUS

PDF

63.7 KB Created: 2021-06-30 10:25:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b3de8ab49e456db7af554d286f21a6a8 SHA-1: 0a27a46bb10a7be67996be7fcf06843fb0590835 SHA-256: 8a65260ef90bb3bb7467f84af67e4befefb84af6cb557bfdf5b239da1ee4bb89
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The file is a PDF identified by ClamAV as a phishing trojan. Static analysis reveals it functions as a link farm, containing numerous URLs pointing to other PDFs hosted on compromised websites. These linked PDFs likely serve as the next stage in the attack, potentially delivering further malware or phishing content.

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 http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a56ee1d9da4---nudixiti.pdf In PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/gd8glkacrone1mrb8019087ftl/tifutijisosev.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/32506c0e54ba8b922140f9eea9a0a626/8236598313.pdfIn PDF document text
    • https://bisnismedsos.com/userfiles/file/fudolesip.pdfIn PDF document text
    • http://kengosushionlineorder.com/uploads/files/51825929668.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/ke20pva478m5p0jogdgn6qjaa0/46042839891.pdfIn PDF document text
    • https://ssvacancy.com/ckfinder/userfiles/files/rorubiwedumi.pdfIn PDF document text
    • https://truck-diagnostic.ru/wp-content/plugins/super-forms/uploads/php/files/e798c042201b31c67d01723c21d24c56/63512379638.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160928b6285b99---ledijigizozudasodojufokap.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/uvfs766hhcivs8a6ntmomi9qc7/7951154418.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160937e15ad3cf---biweduwu.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608012dbe3e1a---baxejanuk.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/ae6e9c4c78103a2487073cf26cf9bfa3/10800758443.pdfIn PDF document text
    • https://tapetcenter.ro/app/webroot/files/userfiles/files/22027287010.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/oubo59qu005rrmlftl1iil5ir7/nigagabonaki.pdfIn PDF document text
    • http://euredit-editions.com/userfiles/file/fegutipa.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/3rakqv7cu7ojbkvb28mujfisj7/xovejeweduvegaz.pdfIn PDF document text
    • http://xn----7sbakn3aoflleitf3m6a.xn--p1ai/userfiles/file/lupalosaboxogogisusozopef.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089e1c75c717---gapadutowuz.pdfIn PDF document text
    • https://nguyenthelong.net/userfiles/files/88515880060.pdfIn PDF document text
    • http://hayatteknoloji.com/webimage/file/gonaritonuvowetodijurix.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a71e308c341---63338016723.pdfIn PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/baa2c62af4e69ad9421feed899de57cf/48739854684.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b9a30d54f6a---sokaz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=cholesterol+is+a+sterolPDF link annotation

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