Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d17facf1578a848…

MALICIOUS

PDF

96.0 KB Created: 2021-10-07 17:01:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 12293b171fd7d2be2337d953137f704f SHA-1: 13ef61db0aeae2f8f65846f1ca48bca679daa5f1 SHA-256: 8d17facf1578a8489c1d930e2e24be82937ca41382386e229b79bd4f69a6312b
154 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Several heuristics point to the document functioning as a link farm, directing users to compromised or disposable hosting sites. The presence of numerous unknown URLs further supports the conclusion that this document is designed to redirect users to potentially harmful destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6955

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://easternresources.net/ckfinder/userfiles/files/jinizimak.pdf In PDF document text
    • http://natur-pet.cz/webpagebuilder/ckfinder/userfiles/files/78826145520.pdfIn PDF document text
    • https://plewmal-d.com/Uploads/files/50600633531.pdfIn PDF document text
    • https://betamachinery.sa/other_files/File/niziw.pdfIn PDF document text
    • https://jeevandeepspecialcare.com/ckeditor/ckfinder/userfiles/files/dewewedatowu.pdfIn PDF document text
    • http://canadapremiumlubes.com/survey/userfiles/files/30246672.pdfIn PDF document text
    • https://turdv.ru/SITE/files/editor/file/50047533080.pdfIn PDF document text
    • https://barcelonacentremedic.cat/files/galeria/files/2263874610.pdfIn PDF document text
    • http://hoteldazegliotorino.com/userfiles/files/7576588797.pdfIn PDF document text
    • http://melabo.com/upload/files/11469913780.pdfIn PDF document text
    • http://whuntex.ru/userfiles/file/guranokedubojirugerasuni.pdfIn PDF document text
    • https://rajaketiga.com/contents/files/wipugevijuludimumetoz.pdfIn PDF document text
    • http://ficfart.org/userfiles/file/56915814098.pdfIn PDF document text
    • https://fototipia.hu/files/files/papigopezedoru.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/161590da2d45f9---50357402780.pdfIn PDF document text
    • http://gospelpour100voix.com/fichiers/newsletter/file/73455072565.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16134ae2d52e1c---98292818594.pdfIn PDF document text
    • http://flexinform.com/hirlevel/file/17686431374.pdfIn PDF document text
    • http://issaproject.com/app/views/panel/ckfinder/userfiles/files/gudaf.pdfIn PDF document text
    • https://luxm.pl/userfiles/file/medimuwojuvunudorabex.pdfIn PDF document text
    • https://divinenine.net/userfiles/file/lofonusel.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1613b8bdc6511f---suvesositararurufafujuku.pdfIn PDF document text
    • http://smartdeal.pl/files/upload/files/mojujowunuborutavewatu.pdfIn PDF document text
    • https://thehouseproduction.net/file/22523669059.pdfIn PDF document text
    • http://elcolono.net/userfiles/files/71092336052.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/13588698682.pdfIn PDF document text
    • http://mevlanaasm.com/resimler/files/dogeredudoxuko.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=what+is+philosophy+according+to+platoPDF link annotation

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