Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fddd4830f8e8599…

MALICIOUS

PDF

63.7 KB Created: 2021-08-12 06:30:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 9039ea1dfdd7c55eb510562fa72f20b5 SHA-1: 07fa802681414afb5f9cb90e1691ac8a16104336 SHA-256: 5fddd4830f8e859932d83a4da3b6d0fe31c453deedb9fde82ec3f2b68dac8624
154 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs, several of which point to compromised WordPress upload directories, indicating a potential distribution point for malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9560

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://oxfordjsr.com/userfiles/file/66822274317.pdf In PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff188055cd---42840105551.pdfIn PDF document text
    • https://ietc-oman.com/userfiles/files/xisoz.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160943c43cd048---92510618157.pdfIn PDF document text
    • http://phuocthuan.vn/images/pic/file/69237106917.pdfIn PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/247qdkr4t6ot7n90d01245qtr3/geninewosewalezamo.pdfIn PDF document text
    • http://lor-rostov.su/userfiles/files/gomowarikejofe.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1d68610b8a---17743321491.pdfIn PDF document text
    • http://hoitruyengiaocodocvietnam.com/uploads/image/files/36268158767.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609da68793fc7---dabusemotakupokitijudes.pdfIn PDF document text
    • http://sl1971.com/clients/5/51/517263f0417f9379c67e6eba0e0bdfe8/File/35508387959.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607d018bca637---38156199516.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/v91d2j5gv5m2cdv4hrq8r5b3j0/tunojizalebiwiwa.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/b44c646d6089b82d587f5425a73fa3aa/97334480166.pdfIn PDF document text
    • http://avstralianature.ru/ckfinder/userfiles/files/68604070633.pdfIn PDF document text
    • http://rolmech-strzelno.pl/Upload/file/nexap.pdfIn PDF document text
    • http://bmsorganica.com/userfiles/file/fanano.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e417997008---88899807043.pdfIn PDF document text
    • http://khunghinhdepphuctin.com/media/ftp/file/10066171763.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/6ef503a5bdb8f5beac0fb499fbffcd39/gomuzewisovedo.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/ea2a3f067dd5def47fac2e9732bd41ca/wavuzubovagukewijux.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/ccv73diu3614h0k5ubke8js5qf/vorufosenulazaladederiga.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/f6c0e2ee0467fb31d69fbd4fe5895a69/vazax.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/053edf50de07b4d69c5b122a4bcab123/15025917101.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=how+to+change+my+hp+printer+cartridgePDF link annotation

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