Malicious PDF — malware analysis report

Static analysis result for SHA-256 576ab29dc5c27027…

MALICIOUS

PDF

56.8 KB Created: 2021-08-15 23:04:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: b1dd4b73fb731a0a8794d6d56d2c2583 SHA-1: 82e17ba55f2d499c8290c35802dbf2be858349e6 SHA-256: 576ab29dc5c27027f266c644fd5c410441a52434638247337594825f8c75ffd2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, many of which point to compromised websites or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. The primary attack pattern involves luring users to click on these links, which are designed to host malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9584

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://queure.ru/uplcv?utm_term=how+to+do+improper+fraction+into+mixed+fraction PDF link annotation
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160a10a6231121---56782581155.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/1lfeiskkild69anbu62kl5dt1t/rujomapujipofade.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/7674f550d94f5e26b91290b9b66c5c77/73102057921.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/tasagojekamatubadi.pdfIn PDF document text
    • https://tecnibat.net/uploads/archivos/72802640339.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160e57c9ad2b58---vedefenikokewowibudog.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608071018028f---lemupufoxogowek.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/ce6159cc3591422833bb42f414d9b909/86907445770.pdfIn PDF document text
    • http://vrieshorst.nl/images/uploads/file/ditonolofifovaxixi.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/d2d16eb34fcc401e9efdff9a0ac56517/vatenidemedinimurol.pdfIn PDF document text
    • https://muzeumkonstancina.pl/attachments/file/kajesubub.pdfIn PDF document text
    • http://hublihorse.com/uploads/userfiles/files/99160825310.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b21a54bf93---22725917347.pdfIn PDF document text
    • http://iviltra.lt/images/files/23852833900.pdfIn PDF document text
    • http://cucthongke.vn/userfiles/file///wutekuwelu.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/0c4e26f611e4bef1fef45554a01becfa/jezuladesezomiremuvudi.pdfIn PDF document text
    • http://walthamclassof1985.com/clients/5/52/52060312c10aa816a718e90a19a6a7a1/File/1501277240.pdfIn PDF document text
    • http://aostavet.it/userfiles/files/tutuvedalejejijov.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/b84dc0f68870113e16e35dc924baf893/pofuzijiginojulagelezume.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1606c819609063---75633865139.pdfIn PDF document text
    • http://absigorta.com/E/file/mepepamitidajedi.pdfIn PDF document text
    • https://gw21.ch/uploads/userfiles/file/loxejiv.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/bcr2ao5qe4m25og77ekprdpmqm/sazixa.pdfIn PDF document text

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