Malicious PDF — malware analysis report

Static analysis result for SHA-256 acb45c6d879bab39…

MALICIOUS

PDF

45.6 KB Created: 2021-06-25 21:32:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: fb52a0878321f4ef49af752388acd573 SHA-1: ed2d06df2a3496b979bd4f411fd50e15b19b3b79 SHA-256: acb45c6d879bab3961c79311d679c08994fba3fa9da54a24064847f20c8b6a43
154 Risk Score

Malware Insights

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

The sample is a PDF file identified as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm designed to redirect users. The presence of these links suggests an attempt to lure victims to external malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9481

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://arlingtonhigh1961.com/clients/e/ef/ef36f0800c0a5d5a0b00d5ecc8c3c6da/File/lisurexesugokip.pdf In PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/gatogiduzir.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/nla6gcvnqdjeoja750u9tolu01/dubezajizuna.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba2b4f2887---fezijoweguxezikar.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a52831af9c9---43358038499.pdfIn PDF document text
    • https://ubranni.com/uploader/files/gudoxozukezaxapor.pdfIn PDF document text
    • https://mmagame.com/userfiles/file/95740703809.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160948d3074748---kozofolanijetagate.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/230492e35c0087c77ab1f19699381da5/82847941574.pdfIn PDF document text
    • http://alwaysfavorentertainment.com/clients/879371/File/konedekika.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607e99c7e411a---woforax.pdfIn PDF document text
    • http://immobilieninvestors.eu/userfiles/file/xesajamonagojorisodo.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/0e59a97721588825e6adbd3028264e3b/tuvejumisatezusenowaj.pdfIn PDF document text
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/c1ee54bcaf9d8e9c6535c7754cde9310/gamokenanazukanag.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/pmlkj1745akbh0jfjpoq5taf4c/dijivawenanewewokadem.pdfIn PDF document text
    • https://samarpanbharat.org/trila/userfiles/file/32850363488.pdfIn PDF document text
    • http://wenxuezj.com/images/File/32191188609.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/47307429b8633a8c59cd631b96fb6992/zodetizaretubafofo.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/84dd4e6b7b55e8da8c686d2a328aa2bd/jukeler.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7a3e6de5f1---voxima.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=a+bailer+or+manual+bilge+pump+is+required+for+what+size+boatPDF link annotation

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