Malicious PDF — malware analysis report

Static analysis result for SHA-256 651885250409ef38…

MALICIOUS

PDF

48.0 KB Created: 2021-09-18 05:28:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 1fb5d8b7e0df4a0df527d7e083793e25 SHA-1: bd182aef2a9196d5528056065728ac06650e1116 SHA-256: 651885250409ef383244e11056b35cd67a3cefecc0649998efe171b2c0f5767c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ClamAV as 'Pdf.Phishing.Trojan' and exhibits characteristics of a link farm, with multiple URLs pointing to compromised CMS upload storage. The presence of external URIs and a high ML score further support its malicious nature. While no scripts were extracted, the structure suggests it's designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5934

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://www.catedralirodahaz.hu/data/editorfile/nogatagilofiniroxubixe.pdf In PDF document text
    • http://drivescuolaguida.it/userfiles/files/togukekomozowi.pdfIn PDF document text
    • http://byecook.com/ckupload/files/zopopobazijexawe.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/16133244d2508a---lefixoxulugagav.pdfIn PDF document text
    • http://modellszerviz.hu/userfiles/file/benebowuguxub.pdfIn PDF document text
    • https://fairtradeportal.pl/userfiles/file/nonuwekakodunadag.pdfIn PDF document text
    • http://kondicionery-noginsk.ru/upload_picture/file/tudipevotukarar.pdfIn PDF document text
    • http://www.masozilina.sk/ckfinder/userfiles/files/xesowere.pdfIn PDF document text
    • https://copperscrap.wasteequipment.net/ckfinder/userfiles/files/80284445352.pdfIn PDF document text
    • https://ooo-kenk.ru/userfiles/file/21948134555.pdfIn PDF document text
    • http://yizhu580.com/ckfinder/userfiles/files/vuvixinesuso.pdfIn PDF document text
    • http://descanso.verareyes.com/ckfinder/userfiles/files/16821574057.pdfIn PDF document text
    • http://kronospan-mofa-hungary.hu/editor_up/nafapijabozufokikotoraba.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613ff83eec75c---tukiwetugenidadeped.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/ja979jk1jj3uu4d4trtrf1pprl/13996727385.pdfIn PDF document text
    • http://aviatechinform.ru/sadm_files/tadipejolifutiwelap.pdfIn PDF document text
    • http://52963566.com/upload/file/202109131835565498.pdfIn PDF document text
    • https://hotellemaritime.com/hotel/upload/files/gafotolepotijo.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/rrdfc3db6ot20c468qvd1q87s9/ximikebujive.pdfIn PDF document text
    • https://cowik.pl/upload/97292292968.pdfIn PDF document text
    • http://grossbuch.com/upload/file/24818318153.pdfIn PDF document text
    • https://atavio.ru/files/file/xomukamol.pdfIn PDF document text
    • http://le-bouquet.be/userfiles/files/latobezipotolonor.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=midoriya+wallpaper+androidPDF link annotation

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