Malicious PDF — malware analysis report

Static analysis result for SHA-256 54e456432f989ef1…

MALICIOUS

PDF

45.3 KB Created: 2021-09-29 09:50:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 15edc2c334b255986b67c255b9b74923 SHA-1: fe65e37bab43f10eda714465112c654ee9e59543 SHA-256: 54e456432f989ef1b294d92bdf0a5231fc0f79130f5ec1ace7c5a561ad18675f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs that point to various websites, many of which are identified as link farms or hosted on compromised CMS uploads. The ClamAV detection and ML classifier indicate a malicious nature, likely phishing or trojan distribution. While no scripts were directly extracted, the PDF structure and heuristic firings suggest an attempt to redirect users to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6486

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://riskhedgetech.com/uploaded/file/162414053361358063520ff.pdf In PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1613ab0f78793c---samenetarinofuxitenesigov.pdfIn PDF document text
    • http://mcutech.net/upload/2021/09/file/1632322782625782536.pdfIn PDF document text
    • http://laibros.com/ckeditor/userfiles/files/fapinenizilutevela.pdfIn PDF document text
    • http://heaig.org/editor/ckfinder/userfiles/files/bevofebirafu.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/16141e1a488cac---34710973558.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/diuu99b1drgv3kp0tuvk1gshqc/lotodani.pdfIn PDF document text
    • http://woodlandhills.ilovepokebar.com/uploads/files/55545871529.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16142bdf619224---93689935613.pdfIn PDF document text
    • http://archidaldegan.eu/userfiles/files/kawopemiwodiwijitawik.pdfIn PDF document text
    • http://orvosvalaszto.hu/uploads/files/bopuxa.pdfIn PDF document text
    • http://newshop.jp/archive/file/12422731722.pdfIn PDF document text
    • http://constantcontinuity.com/membership/data/files/72104089633.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161502a456fa0f---vovewane.pdfIn PDF document text
    • http://dolphinegypt.net/userfiles/file/sopakaziduxupowezu.pdfIn PDF document text
    • http://top-caster.com/userfiles/file/35479771581.pdfIn PDF document text
    • http://kamakuralosgatos.com/uploads/files/venuxufa.pdfIn PDF document text
    • http://tele-klass.ru/i/upload/files/53352689798.pdfIn PDF document text
    • https://wietsevoermans.nl/ckfinder/userfiles/files/66221124053.pdfIn PDF document text
    • https://hsse.cl/files/bexusosikap.pdfIn PDF document text
    • https://riwg.in/userfiles/file/39598217222.pdfIn PDF document text
    • https://profitaler.com/UserFiles/file/boxinawekel.pdfIn PDF document text
    • http://schubert-hh.de/image/file/gidagurinezep.pdfIn PDF document text
    • http://webinaris.biz/ckfinder/userfiles/publics/files/nutisimuguziju.pdfIn PDF document text
    • https://millersexpress.com/userfiles/file/19595530899.pdfIn PDF document text
    • https://fibaquitaine.fr/cebatrama/userfiles/files/51698025606.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/besuratojelixibaloduboju.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=123movies+download+websitePDF link annotation

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