Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcaccd458c2703dd…

MALICIOUS

PDF

65.0 KB Created: 2021-09-05 14:49:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e7fca73dbdca23057db3ab9b63339874 SHA-1: 1c79300dd2f1ac023c2f34e2e42e9a7e708c6435 SHA-256: bcaccd458c2703dd7d10f857f9d55af538bb45aad35404c318001856439a3c90
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of link farming on disposable hosting, suggesting a potential SEO manipulation or distribution scheme. The ML classifier also flagged the PDF as malicious, supporting the assessment of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6381

Heuristics 4

  • 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://wcsps.com.tw/ckfinder/userfiles/files/85608639629.pdf In PDF document text
    • http://galantemontagnana.it/ckfinder/userfiles/files/40638225766.pdfIn PDF document text
    • https://gw21.ch/uploads/userfiles/file/18640051480.pdfIn PDF document text
    • https://open-call.fr/uploaded/files/19048249005.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe8d422b57---80447874197.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/baxevulafir.pdfIn PDF document text
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/2b943df80c7c9ff7aab68390751c686d/nowozojupeluga.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a284e3d985c---76558708255.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4d83145e1c---luzon.pdfIn PDF document text
    • https://proektasis.gr/admin/spaw2/uploads/files/difewewolifutabasejuse.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/m9a83e9c86bbtgv66eirbf3p62/fiperuzuwisukozag.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/46b61dc097c2e2b0ab7d443045117e67/58846431089.pdfIn PDF document text
    • https://sharmtocairo.com/userfiles/files/90770947902.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/a343035e2a3a0520c8f29afe0185259b/97417793930.pdfIn PDF document text
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/f34cfeks540ehs1k87l6jpjt42/87782096388.pdfIn PDF document text
    • http://parquessolaresdenavarra.com/userfiles/files/wuzopitepeg.pdfIn PDF document text
    • http://glastergroup.ru/userfiles/file/48884629652.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091610389f94---25674226082.pdfIn PDF document text
    • http://n-production.com/upload/fckeditor/file/jasosadovazizofur.pdfIn PDF document text
    • http://kstarsmall.net/userfiles/file///83856238417.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1611afea4568ab---tadiwowaluzaleforeweje.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2cd14f66e---tubotelavenoxuzora.pdfIn PDF document text
    • http://auchli-appenzeller.ch/userfiles/files/joresexut.pdfIn PDF document text
    • https://arte-salon.ru/upload_picture/gexesuwedoluw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=ieee+papers+on+artificial+intelligence+pdfPDF link annotation

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