Malicious PDF — malware analysis report

Static analysis result for SHA-256 da775fb8648354b6…

MALICIOUS

PDF

45.8 KB Created: 2021-09-08 02:15:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 4ffd9f5ccca826a5aa793901254c6bfd SHA-1: 25e3734a4f6a2cd6a1f7ad063a9ef4c60f4ff88c SHA-256: da775fb8648354b67b026d72ce92dc77a5cabf74ca6a356f4d8568ebf1daa294
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a phishing or malware distribution attempt. The presence of PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics indicates a link farm designed to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7407

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/f13df8ccd1279a107ce43429d0b7c7ad/94122028313.pdf In PDF document text
    • http://zbraneklapka.cz/ckfinder/userfiles/files/25475442372.pdfIn PDF document text
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/u310n8nadvvniostr6avbuhbg1/rilog.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091180f08848---fufigatilabo.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1608462578d6ee---60704008706.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/i8f95rbejo4pns125hrd2735l6/64869506987.pdfIn PDF document text
    • http://apexnepaltravel.com/userfiles/file/46022955096.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160be0be6ce4bc---62742889131.pdfIn PDF document text
    • http://abcbyspu.com/ckfinder/images_store/files/18082737687.pdfIn PDF document text
    • https://optical-axis.com/uploads//files/202108041015258782.pdfIn PDF document text
    • https://unosms.us/userfiles/file/3145278943.pdfIn PDF document text
    • https://riolospettacoli.it/filesUploads/file/96789062856.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/5267003b813974ee00b15ebb3c86309a/47582064290.pdfIn PDF document text
    • http://szjglaw.com/uploadfile/file/2021081602483273499.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609133c01000f---60342796743.pdfIn PDF document text
    • https://www.winsum.frl/ckfinder/userfiles/files/mikobatimomogunapuforugim.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/28862ee8a5c4d21e5c5852e9c9e54bf7/saxifewo.pdfIn PDF document text
    • http://purepoem.com/resource/docContentImg/file/2021-08-07/eaa679981c79a5a00cf0a7a1d3b4fb97.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/e3a03ce09c864717e01716e905842102/nosowitatadosa.pdfIn PDF document text
    • https://sealskinz.ru/files/file/62845248087.pdfIn PDF document text
    • https://www.hosotte.com/ckfinder/userfiles/files/guberiridifalikon.pdfIn PDF document text
    • http://dxczx.com/ckfinder/userfiles/files/20210809_172842.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a744d99ed52---vijofutiremipo.pdfPDF link annotation
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=continuum+companion+to+research+methods+in+applied+linguistics+pdfPDF link annotation

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