Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c64a211195d8fe7…

MALICIOUS

PDF

40.7 KB Created: 2021-07-14 01:13:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-22
MD5: c0b1eb0a785a90801fdc37b88c2e7d16 SHA-1: 639ad03794f145edff309470391bb0ac06a6bfea SHA-256: 0c64a211195d8fe7627b6cd84eab411a49619089cc1d29c4f43e291837ecc6e7
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 0.9402

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 40 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 https://amd-export.com/site/upload/file/sejufuzafen.pdf In PDF document text
    • http://aucoindeshalles.fr/menu/file/68248809459.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160d8c37e532d2---gigidolekorunizafoni.pdfIn PDF document text
    • http://cz-synergy.cz/data/file/vekovoworolezefodaf.pdfIn PDF document text
    • http://xn--clinicaquirogavilario-vbc.com/wp-content/plugins/super-forms/uploads/php/files/7k8b94d4l9n62klq5o78vfq515/69134155063.pdfIn PDF document text
    • https://sportsht.com/userfiles/file/kuriwaronodaluwor.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/3cbb477f26148b96fa683c22f3078b72/50312451131.pdfIn PDF document text
    • http://royalgoodviewresort.com/Uploads/file/49236653865.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160876c645f9b7---wetupuvir.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608cb9039d6a8---4396742995.pdfIn PDF document text
    • http://nuraski.pl/wsg/userfiles/53071979595.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba289a866b6---60399340270.pdfIn PDF document text
    • http://xn--80aafbkbafwdti1ahihccrg.xn--p1ai/pict/file/76544990760.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/jdt8fv5b321tm8sbl38p8kmvho/93042327082.pdfIn PDF document text
    • https://office-agglo-larochelle.fr/userfiles/file/15362545599.pdfIn PDF document text
    • http://seoulsquare.com/userfiles/file/bexumemidoz.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c6c388da2a7---46902827601.pdfIn PDF document text
    • https://finatwork.com/userfiles/file/mofuzolisadupupamizif.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/o82js307jd7enr3ahu299u64p7/4150881649.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608578b165b65---47040787077.pdfIn PDF document text
    • http://uro-medical.pl/zdjecia/fotki/file/97218012759.pdfIn PDF document text
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/95545fe731040cd643f2e2ae029ada91/kuxikoveze.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=swot+analysis+example+for+bakeryPDF link annotation

Related samples 8

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