Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a76ca253cf81032…

MALICIOUS

PDF

41.8 KB Created: 2021-09-05 00:05:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 09272c8ed42523f73ac90b6b75b423ea SHA-1: 9493c2cdef48714b2dd5513a912f1e08bf6e148a SHA-256: 2a76ca253cf8103234bfd893abc03275f6bf3ffede2fc0888628fd2cb230f5a9
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and uses an image-based lure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7092

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 41 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 http://dfwarbitrator.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/mesenugamadufomerepobe.pdf In PDF document text
    • http://acmemask.com/upfiles/editor/files/2735106810.pdfIn PDF document text
    • http://hurtmar.pl/Upload/file/48209796914.pdfIn PDF document text
    • https://topinsolventa.ro/userfiles/file/zinokutad.pdfIn PDF document text
    • https://felix-schulze.biz/wp-content/plugins/super-forms/uploads/php/files/7iioijlof3efq4t4liuj3pl463/24591646871.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609a8460aeaa5---jotiwejitesaxini.pdfIn PDF document text
    • http://adamslakeband.org/userfiles/file/porenudunasogotabudoteto.pdfIn PDF document text
    • http://luvnchrlysenglishtoys.com/clients/861429/File/sasugurujukijezovugo.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6a1be5c509---16830525887.pdfIn PDF document text
    • https://bazab.ru/ckfinder/userfiles/files/78141759057.pdfIn PDF document text
    • https://asfus.net/virgsurv/userfiles/file/19141295838.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160e64b8bb5c2f---9608420097.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160733d97eb1f1---raxava.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e23d608a50---9212541793.pdfIn PDF document text
    • https://dwitunggaljaya.com/sitefiles/file/83234478441.pdfIn PDF document text
    • https://hsse.cl/files/jasugus.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/bd2498i249p96h8n0jhdendc74/womidelomujabamanuwufipu.pdfIn PDF document text
    • https://soudurelauziere.ca/upload/editor/file/fitamosugadupesikixirotir.pdfIn PDF document text
    • http://www.ortodonciaelisafarache.com/ckfinder/userfiles/files/baletakinivixenufet.pdfIn PDF document text
    • http://findmealocalpainter.com/insurazon/admin/userfiles/file/sumowukokisukakivafe.pdfIn PDF document text
    • http://machinegroup.ru/img/outer/files/lofosavetabewixewizof.pdfIn PDF document text
    • http://nadiadsa.org/userfiles/file/51300119611.pdfIn PDF document text
    • https://irish-setter-zucht.info/ckfinder/userfiles/files/76576718789.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac7cebbb6a---9014386766.pdfIn PDF document text
    • https://oilbasaro.com/web/images/ckfinder/files/20210629204521.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=navaratnalu+full+details+in+telugu+pdfPDF link annotation

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