Malicious PDF — malware analysis report

Static analysis result for SHA-256 89b8d9d7a3bf49ad…

MALICIOUS

PDF

39.6 KB Created: 2021-09-03 06:31:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 55e0c59daad3f2dbbce7ab03331da9f5 SHA-1: 5cd490ffcee8ae6ddb720846e7860fbe3bfe7022 SHA-256: 89b8d9d7a3bf49ad8aaa32d760ca2496074264e0f36114c1301f560072dd1626
174 Risk Score

Malware Insights

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

This PDF is identified as malicious by ClamAV and a machine learning classifier, exhibiting characteristics of a phishing lure. It contains numerous links pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious sites. The document's structure, being image-heavy with minimal text, further supports its use as a deceptive interface to trick users into clicking on these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8883

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 39 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://gentlemensquartersbarbershop.com/wp-content/plugins/super-forms/uploads/php/files/dbf59bdcc0bcd37a9905a1131ac77ad3/21337062770.pdf In PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b55def2fba8---durizirevimebexolu.pdfIn PDF document text
    • https://www.restaurant-latableedevercel.com/ckfinder/userfiles/files/18466922870.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/10528e917c37f336579a7ea9d4ac45bb/pivivikevoforira.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac2f15c2620---xorivapew.pdfIn PDF document text
    • http://agendaalzheimer.org/files/galeria/files/dorewejoxawesiwubinamawul.pdfIn PDF document text
    • http://xn--80aafbkbafwdti1ahihccrg.xn--p1ai/pict/file/13739723332.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/02d1f965c958007ec541889366dc3b04/64549659386.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606fe943813d3---jurix.pdfIn PDF document text
    • https://cordovajewelry.com/images/file/kimorowazawerofut.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ff2844c6f05---kifapokogodu.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d076cd5ae9---vumilulus.pdfIn PDF document text
    • http://186086.com/upload/files/43722856154.pdfIn PDF document text
    • http://studioghittigargnano.com/userfiles/files/21851315682.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b32d8587420---wekam.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160777eb6ad3d2---zapagavebuvegi.pdfIn PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/8843701990.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=all+math+formula+in+marathi+pdfPDF link annotation

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