Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1e788d104ccbc6b…

MALICIOUS

PDF

63.6 KB Created: 2021-08-26 14:49:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 3d0dfda80d702a85cb9408af9d7cd7e8 SHA-1: 5dd977a0c3559148301bb36079a9bce52cc04ed2 SHA-256: b1e788d104ccbc6becf47a48754a791e825fbfc2b881aa3e111a938fbc96c75a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm for SEO manipulation or malicious redirection. The ClamAV detection and ML classifier further support its malicious nature. Although no scripts were explicitly extracted, the structure and URL patterns are consistent with phishing or malware distribution lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6241

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://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e50bf6c2f46---5891461657.pdf In PDF document text
    • https://hoavily.com/uploads/files/joxeseg.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/16073abf81e3cb---jesojoremosegotulofow.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1608aeb3b3c769---daxutawadutawepokadulimud.pdfIn PDF document text
    • https://o-dance.com/upload/files/85118953259.pdfIn PDF document text
    • http://atthaya.com/file_media/file_image/file/2018181483.pdfIn PDF document text
    • http://www.radanhorse.com/resource/files/noloruze.pdfIn PDF document text
    • http://www.web-globus.de/ckfinder/userfiles/files/pedeverudilikukav.pdfIn PDF document text
    • http://cafegreenwichvillage.com/uploads/files/gejozomejaromirikir.pdfIn PDF document text
    • http://big-blue-bus.com/pics/fotos/1/file/kitirutolexesazax.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/8c50c4843b81d6b5926896921ff38d57/18508698615.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/ut8rkmm5d8lg7it0rkadc6dt5k/sadefisozuvo.pdfIn PDF document text
    • http://royalgoodviewresort.com/Uploads/file/motobezorokar.pdfIn PDF document text
    • https://cnn-logistics.com/asset/files/takajulusoferijupekidoli.pdfIn PDF document text
    • http://odpadykj.cz/UserFiles/File/tuvesexogetanogenakutof.pdfIn PDF document text
    • http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16082b4e78d8ce---37352430223.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/16085f7dd5a387---faroka.pdfIn PDF document text
    • https://dpengineers.info/admin/userfiles/file/49372805970.pdfIn PDF document text
    • https://globalcareerclub.com/FCKeditor/userfiles/file/wusutukoroxowilegifu.pdfIn PDF document text
    • http://55thocscompany.com/clients/62662/File/57186796719.pdfIn PDF document text
    • http://cafesezony.ru/fck_editor_files/files/84385263372.pdfIn PDF document text
    • http://profesniprukaz.cz/ckfinder/userfiles/files/zapek.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=salford+chipping+nortonPDF link annotation
    • http://irodori.kir.jp/files/file/nokasuserarotibobuxap.pdfIn PDF document text

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