Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e53a519c8cd4207…

MALICIOUS

PDF

43.7 KB Created: 2021-09-20 01:04:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 97dfa924a7bd3c8c7bbd5db765cf71db SHA-1: 47156293ca6e74e78fe38fe20cd853dc50173420 SHA-256: 4e53a519c8cd420724e5b786b2e1776882f37d56611b602b8a41027e1ccef028
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a link farm. It contains numerous external URIs pointing to various domains, suggesting an attempt to redirect users to potentially malicious websites. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7355

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://garglob.ru/uplcv?utm_term=change+icon+app+android+studio PDF link annotation
    • http://uptownfallschurch.com/uploads/files/1237221680.pdfIn PDF document text
    • https://curvy.tw/upload/files/96294337162.pdfIn PDF document text
    • http://autolubitel-irk.ru/userfiles/file/tigaled.pdfIn PDF document text
    • https://faguaflowers.com/images/admin/file/pavidulafoligosemakol.pdfIn PDF document text
    • http://myphamso1.net/uploads/files/wobixo.pdfIn PDF document text
    • http://orosweb.hu/ckfinder/userfiles/files/zurufasin.pdfIn PDF document text
    • https://celebicatering.com/upload/ckfinder/files/87989875407.pdfIn PDF document text
    • https://dallaslandscapedesign.com/media/files/88965480491.pdfIn PDF document text
    • https://svarovanijelinek.cz/ckfinder/userfiles/files/96589167160.pdfIn PDF document text
    • https://propiedades.net/ckfinder/userfiles/files/63858179039.pdfIn PDF document text
    • https://bipalisdemo.dashindonesia.com/userfiles/files/91112861939.pdfIn PDF document text
    • http://style4.allwebeasy.com/userfiles/files/87999235229.pdfIn PDF document text
    • http://susutour.com/userfile/file/34308129093.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/16134c338440af---nipiruvisufijemiwukilida.pdfIn PDF document text
    • http://vencedor.coop/images/admin/file/zopikunumirafo.pdfIn PDF document text
    • https://cursosadistanciayonline.com/medios/files/bobedin.pdfIn PDF document text
    • http://www.tiande-global.com/ckfinder/userfiles/files/62730976226.pdfIn PDF document text
    • http://chroscina.com/userfiles/file/vibejixevipijobu.pdfIn PDF document text
    • https://fasaac.org/temp/files/7359238928.pdfIn PDF document text
    • http://natur-pet.cz/webpagebuilder/ckfinder/userfiles/files/selowom.pdfIn PDF document text
    • https://topupdana.com/contents/files/96817515737.pdfIn PDF document text
    • http://hebammenglueck.de/ckfinder/userfiles/files/kofemaxuxurufune.pdfIn PDF document text
    • http://ncteonline.com/userfiles/file/zosibu.pdfIn PDF document text
    • http://tagsu.com/attachments/fckattachments/file/rudipo.pdfIn PDF document text