Malicious PDF — malware analysis report

Static analysis result for SHA-256 19b5e9817f60b78a…

MALICIOUS

PDF

46.8 KB Created: 2021-09-23 10:00:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 95f5da2c24f5f8fefddb090646e3ce72 SHA-1: cb6cd47d0d8ee5bf573663b1f85d6222fb082285 SHA-256: 19b5e9817f60b78aecc20b95f31f0a68b45b9486d9403a55d391b6860d3c6d47
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8030

Heuristics 6

  • 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.
  • 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 http://ymjgolf.com/file_media/file_image/file/fegab.pdf In PDF document text
    • https://kalitelivideoizle.com/resimler/files/vugukuju.pdfIn PDF document text
    • http://leinerpakgelatine.com/survey/userfiles/files/73241565652.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/90379d102a49194a95385e915803ddd9/1908073626.pdfIn PDF document text
    • http://ceramkgres.ru/userfiles/file/zobumufi.pdfIn PDF document text
    • https://lyna-garage.com/htdocs/cljr/data/files/zanuvoxe.pdfIn PDF document text
    • https://loyallcanada.net/editor_files/file/12983272583.pdfIn PDF document text
    • http://duancanhotot.com/upload/files/46660312518.pdfIn PDF document text
    • http://cocoon-source-harmonie.fr/public/file/doget.pdfIn PDF document text
    • http://trip-sale.ru/userfiles/file/pavidoseferijalekilakab.pdfIn PDF document text
    • http://lungshingcentre.com/userfiles/74662529689.pdfIn PDF document text
    • http://waypl.pl/upload/File/jexarowolefuwemadafipul.pdfIn PDF document text
    • http://gorisum.net/fckeditor/upload_file/file/65941349437.pdfIn PDF document text
    • http://chip-chup.hu/upload/file/fixuked.pdfIn PDF document text
    • http://kcntanduc.vn/img_duhoc/files/ledixugova.pdfIn PDF document text
    • http://debten.net/UserFiles/File/93338884261.pdfIn PDF document text
    • http://zrdb-drogbud.pl/Upload/file/rokifu.pdfIn PDF document text
    • http://clinicaveterinariacene.com/userfiles/files/72493157047.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fe56d26066---wijixodorigofa.pdfIn PDF document text
    • https://melz-feu.ru/upload/pepikibe.pdfIn PDF document text
    • http://52963566.com/upload/file/202109020520269461.pdfIn PDF document text
    • https://www.pu-sk.com/app/templates/js/ckfinder/userfiles/files/93104266008.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134fabc81a7f---8150139801.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=can+you+set+a+gif+as+android+wallpaperPDF link annotation

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