Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a19ffd475afc78a…

MALICIOUS

PDF

48.0 KB Created: 2021-09-13 20:13:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 5fb24b7602d29f34c04248da8485370d SHA-1: e698cd15e3308266a1814624eb2874845d424be5 SHA-256: 4a19ffd475afc78a4a093ef512544a88ac0efc71fa88642caad2a8ef3a492621
154 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs that point to other PDFs hosted on compromised WordPress sites. The presence of these links suggests an attempt to direct users to malicious content, likely for phishing or further malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5740

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.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613271761a860---23967414996.pdf In PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16139b1de8a887---sinakadexurewodinagupuv.pdfIn PDF document text
    • http://miryangpension.com/FileData/ckfinder/files/20210901_0657F2FBCC98C663.pdfIn PDF document text
    • http://tks-forever.com/upload/2021/09/11/file/xizadekogugopazazu.pdfIn PDF document text
    • http://mgbig.com/upload_fck/file/2021-9-7/20210907140551743964.pdfIn PDF document text
    • http://vinhthuan.vn/upload/files/wibatevusuvinula.pdfIn PDF document text
    • http://crm333.com/documentos/file/62827787608.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/161361c974bbf3---rewezijulavibasexowag.pdfIn PDF document text
    • http://spamsmsgiare.com/media/ftp/file/83802383137.pdfIn PDF document text
    • http://kkc1.org/htdocs/cljr/data/files/jamamogon.pdfIn PDF document text
    • https://zhavezbozi.cz/data/file/doresadofuxex.pdfIn PDF document text
    • https://callmarkinvestments.fortunekenya.com/callmark/files/66752389066.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612f02f656585---tuzebigurogebu.pdfIn PDF document text
    • http://barrybusiness-crm.com/ressource/devis-photo/files/tabuwa.pdfIn PDF document text
    • https://sitarasign.ir/data/file/38599350864.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613c26deb8a79---zalepamilarupoliketogeg.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/60883d93e3152c7a51ba53e4bd414bf7/55492529211.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/c271f06513a56c73da992e6f8c2fc08c/pugowulen.pdfIn PDF document text
    • https://softwebstar.com/shop/userfiles/file/lutuxotugijoru.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613361f7ba23d---sogifem.pdfIn PDF document text
    • https://thieumaunao.vn/workspace/develop/uploads/ck_upload/files/kuwutaputaxumav.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/e1fa69e7affbdecce86f3d9590c49294/52447825143.pdfIn PDF document text
    • http://ginzaramen.us/uploads/files/dutebuj.pdfIn PDF document text
    • http://ecohost.ru/pics/images/file/80016346771.pdfIn PDF document text
    • http://rcot.by/pics/files/68454720882.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161333b2e6068b---57372524058.pdfIn PDF document text
    • https://xedulichhaiphong.vn/images/news/files/molujozozuvofaxatovo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=social+networking+pptPDF link annotation

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