Malicious PDF — malware analysis report

Static analysis result for SHA-256 9efa752c0cf4e85c…

MALICIOUS

PDF

46.8 KB Created: 2021-09-16 17:48:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-03
MD5: 27278c747d2cdb0b57f1f7f074cf7cdd SHA-1: 5507b8e09f4146d19ff372ba7777c571bc599b10 SHA-256: 9efa752c0cf4e85cfc3c09720c83db9adcf47219b8dd984dd27361808fd00633
162 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample contains embedded JavaScript and a significant number of external links, many pointing to disposable hosting or compromised CMS upload directories. This suggests the PDF is designed to redirect users to malicious sites, likely for phishing or to download further payloads. ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7355

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://davidfauquemberg.com/home/fauquemb/david/bbdg_site/userfiles/file/3831642835.pdf In PDF document text
    • http://inistor.com/ufiles/files/43500939412.pdfIn PDF document text
    • https://ymy-tea.tw/upload/files/kuvipujotiwigutigiku.pdfIn PDF document text
    • http://aodaiminhhanh.com/app/webroot/uploads/files/78940108847.pdfIn PDF document text
    • https://thietkewebseo.com/webroot/img/files/kawefojozetugagajinilem.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d0f1e203d4---47173664868.pdfIn PDF document text
    • https://primer-spb.ru/files/files/tibolebumalum.pdfIn PDF document text
    • http://sjmhospital.org/files/js/ckfinder/userfiles/files/jijuginabiwasop.pdfIn PDF document text
    • http://hp-cnc.de/uploads/files/logow.pdfIn PDF document text
    • https://argentinaproduct.com/ckfinder/userfiles/files/nuvibo.pdfIn PDF document text
    • http://sgrappresentanze.eu/userfiles/files/91054188520.pdfIn PDF document text
    • http://consorzio-csa.it/userfiles/files/kefuwiwovenakorebinewus.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/e6481cc622e236cd5b730fc10747f3a6/50733772987.pdfIn PDF document text
    • https://supportsystemsvainc.com/home/ssvi/public_html/ckfinder/userfiles/files/penuvutoxexatikoraditit.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/furasezox.pdfIn PDF document text
    • https://shreegroupco.com/userfiles/file/wivoboduvoderisutel.pdfIn PDF document text
    • https://hetodon.com/fckeditorfiles/file/ramisefanupewafafig.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133c1982a9d9---saroka.pdfIn PDF document text
    • https://deesudcoolingtower.com/userfiles/file/62569263799.pdfIn PDF document text
    • https://reformedgeneration.com/userfiles/file/kosezuvujutaxe.pdfIn PDF document text
    • http://autobedrijvenindex.nl/images/uploads/mudamamudi.pdfIn PDF document text
    • https://femagnet.com/upload/edu/article/file/46689933851.pdfIn PDF document text
    • http://urbanposthotel.com/admin/ckfinder/userfiles/files/wapewobiwobi.pdfIn PDF document text
    • http://www.kyousei-fukushi.or.jp/system/ckfinder/userfiles/files/49113075911.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=earth%27s+atmosphere+blocks+short+wavelengths+of+the+electromagnetic+spectrumPDF link annotation

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