Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7cae41357aea59d…

MALICIOUS

PDF

74.8 KB Created: 2021-09-07 17:04:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3fd9fab78b3a8f0a3f9e43d3d8136edd SHA-1: b000552d42524d1d0c73a29fb7b068ce945dad29 SHA-256: a7cae41357aea59d8130479cdb70c776a1e6cb2c13ed60818d51d05a23630ed1
154 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It functions as a link farm, containing numerous URLs that point to compromised CMS upload directories. These links likely serve as lures for phishing attacks or to distribute further malware. The presence of 'utm_term' parameters in some URLs suggests an attempt to track user engagement with these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9273

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://tannhatviet.vn/upload/files/49552749345.pdf In PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/50566e0f8720790b68ee141459ad4d0d/8547146446.pdfIn PDF document text
    • http://www.elstar.ru/uploads/files/17071276657.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/d7bc527dc05282fa1cc2f5afe2e16eee/49892179741.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1612602a8b811d---fuxiduwoxagemu.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1d9bd617f6---rututasaxajetagumi.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d35915f78e---54323321982.pdfIn PDF document text
    • https://bestcoloringpages.com/userfiles/file/towadonanuzavopi.pdfIn PDF document text
    • http://gursakaryahukuk.com/images/file/webuvujezowuzo.pdfIn PDF document text
    • http://rothemtour.com/FileData/ckfinder/files/20210707_471230766C6C7CE4.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/b6ossetu3bo2bat3e9d4f9ctfg/wafew.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160be718085162---44639407843.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/1ok01tb3jd0q6cdkn32e9t1klt/wixokobamakamapidapaka.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160892c5c062ae---36369571852.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/4ed035bc87c7508aa08b40e7c67f78cf/kevajamabixirivetak.pdfIn PDF document text
    • http://carrozzeriardue.it/userfiles/files/29608988417.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/b433c7e7b8a13771a66295942af0d027/xugivumoda.pdfIn PDF document text
    • https://drsaman.com/files/pijeritadejilanove.pdfIn PDF document text
    • https://angem.fr/userfiles/file/92005583307.pdfIn PDF document text
    • http://learnersdigest.org/userfiles/file/68460629479.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/160991dd46b1c8---xapedevuvin.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a3b0ac14f29---sapuzavusidafog.pdfIn PDF document text
    • https://congthuonghotel.vn/app/webroot/files/images/pages/files/zopirilokuganefol.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160ac304b7280a---65378606673.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=teoria+geral+da+administra%C3%A7%C3%A3o+chiavenato+pdf+downloadPDF link annotation

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