Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3c12ef7a6e4dbad…

MALICIOUS

PDF

49.9 KB Created: 2021-09-06 07:45:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: f19aee8f42bbb4d2d4516f7018007370 SHA-1: 92e3bcf8543caaa4aeee866feb6411bec657a79e SHA-256: f3c12ef7a6e4dbadba6461c43373f82f62ca9b72edfc3c65ab8ca7268003e17d
154 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. Static analysis reveals it functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and other disposable hosting. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7960

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://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/cc9135316a9ae116a2de1d195835ede1/96086502411.pdf In PDF document text
    • http://agcslohian.com/userfiles/file/27956932448.pdfIn PDF document text
    • http://hzkontejnery.cz/ckfinder/userfiles/files/35359090731.pdfIn PDF document text
    • http://schooldistrictservices.com/clients/f/f6/f6ab1571d2cdf5e569af7b76e288b17c/File/87629042213.pdfIn PDF document text
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/6bcf4464c5133bbd9b54922de2177e13/39305046098.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/eba3d10bc05bf5ed28e23b5e69796568/vuduvur.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16097c1367f4d5---sajukilibibajar.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/ddb46fa31bfb277fd87a059c204c25f4/9545943165.pdfIn PDF document text
    • https://eminencesolutions.in/resources/userfiles/file/tixokesa.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca1e71e1a3---89223444465.pdfIn PDF document text
    • http://rpsbchamber.org/editorData/file/80611330424.pdfIn PDF document text
    • http://i-dron.cz/data/file/sibud.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/5b063d41671c348bf2798865a2731eca/mijobomatisine.pdfIn PDF document text
    • http://teresachild.com/upload/files/30591852427.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/c7deb8cd4282a9a059f14f6b8e610d52/72607316324.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/160804f3059bc2---rolozivuji.pdfIn PDF document text
    • http://rhodeislandaIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=subtracting+3+digit+numbers+without+regrouping+worksheetsPDF link annotation

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