Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7b7cb31a5370f9c…

MALICIOUS

PDF

59.5 KB Created: 2021-06-29 13:57:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 487d7fd4ab19c6d53c00a1a7259a5452 SHA-1: 76084d4b080fad4635e02eb88d36fb6ceba703b3 SHA-256: e7b7cb31a5370f9ca54fb65a0d85034f6397650dbdf4bcf64cf253b6b62e6e9d
154 Risk Score

Malware Insights

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

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 designed for malicious purposes. The ClamAV detection and ML classifier strongly suggest this PDF is a phishing or malware distribution vehicle. No scripts were extracted, but the structure and heuristics point to a social engineering attack leveraging malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5305

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://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/9b546b1f8906b3b19af130f510106d3a/kafug.pdf In PDF document text
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160805278b698d---17427497374.pdfIn PDF document text
    • https://mimpishio2bet.com/contents//files/87821794407.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/58459495248.pdfIn PDF document text
    • http://tamker.hu/userfiles/file/wimisovili.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f68e06d562---64719268042.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/37652344449.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/2u4ohrfrfr4402tr8c5g41p812/fakibudoxoralowele.pdfIn PDF document text
    • http://ks4073.com/file_media/file_image/file/wejesitiponugiwizesaxesim.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160acd4fb1ce91---gibimi.pdfIn PDF document text
    • https://oriental-kitchens.com/userfiles/files/19436816137.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609e2bf8bfc22---jifomirujiwofekunipo.pdfIn PDF document text
    • https://samavetpharm.com/userfiles/files/93413533183.pdfIn PDF document text
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/62ceb630cbfe3ef521093e9015614e05/21882954330.pdfIn PDF document text
    • https://tenfci.org/userfiles/file/8133238443.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/59355360418.pdfIn PDF document text
    • http://cbestdesign.com/ckfinder/images_store/files/59267692085.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5694973fb4---romiwawedikisa.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160943e80b06d3---68582659248.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c631b643975---fenezujolimakekopa.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a29edbd6c8b---70765755694.pdfIn PDF document text
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/9f13d5b6af769a9d72b69b103c6a811e/bojuvagorojugexobuvora.pdfIn PDF document text
    • http://dringraldi.com/clients/7/73/73ccc230e5ee2b020474e4a43bcd07af/File/moliboxaresevak.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=department+of+education+and+trainingPDF link annotation

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