Malicious PDF — malware analysis report

Static analysis result for SHA-256 65ad34e17acc54f8…

MALICIOUS

PDF

65.1 KB Created: 2021-07-17 16:19:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 540cef7fce5cce802d5a42f738e3af43 SHA-1: a93a067a4bc1fbea6c8dbb311651eee0566c4fc6 SHA-256: 65ad34e17acc54f8edf4887a41dd35f0219c421a470dee752948ededf7dfdaf1
154 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to various websites, many of which are hosted on compromised CMS platforms. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for these links. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7281

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://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/ench62vfub6mug4vjlgukt0m75/beguve.pdf In PDF document text
    • http://hersheyhigh1981.com/clients/37302/File/tafitefisovureworejaz.pdfIn PDF document text
    • https://mavibusiness.it/file/6911646081.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/16089eaf0e9435---zoden.pdfIn PDF document text
    • http://livingkaneohe.com/userimages/jexopuxabiwagisitapanoxax.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/bq3cq66j3hruv1mumsiti39jl5/wolufesalarewoderepipez.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/321f431e61ac5c9a8bbd38576142f222/18566789651.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/d95alkpp7o91kdaih1nakdv89e/lazatalos.pdfIn PDF document text
    • https://muacash.com/webroot/img/files/97165528613.pdfIn PDF document text
    • https://anmimar.com/royal/userfiles/file/57217144278.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/094660b675a974b60e4adbd50cc92e6c/64141451506.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/1607211a87cd09---zuvivad.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/senijebupotaxariguxuw.pdfIn PDF document text
    • https://remoteworkerclub.com/wp-content/plugins/super-forms/uploads/php/files/96efb5bf3eec7283aad377e37edb85d0/34967482200.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/77da7aa3c6b2a4244b0f38f1d2548d1c/wunaxeb.pdfIn PDF document text
    • http://afgventuregroup.com/cfiles/file/kofoxukiduriku.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f0e78c496f5---73807315470.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/8e8ab970e0975acaa29560ae1f8a158e/bodagi.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/n9d74r6aj5uvrvihv74kd2t3i6/16312439873.pdfIn PDF document text
    • https://autotrans911.com/thread/admin/uploads/file/ribiwomelowamiwewusi.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bf2e971d030---dewuluvuw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=gk+child+questionsPDF link annotation

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