Malicious PDF — malware analysis report

Static analysis result for SHA-256 95612de88a6d3080…

MALICIOUS

PDF

52.5 KB Created: 2021-09-12 23:50:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 2f87b358c0111fced618c4823924ecac SHA-1: 31723ebc4b81c6eff33f3993961797dfb5161288 SHA-256: 95612de88a6d308089dc32b113c81b4dd4c8982974b7137a9eafc699da521e0a
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV, specifically as a phishing trojan. Static analysis revealed a large number of embedded URLs, many pointing to PDF files on various domains, suggesting a link farm or phishing lure. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a tactic to distribute links across many disposable hosts. No scripts were extracted, but the overall structure points to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4952

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 http://ikkosushi.com/uploads/files/zovexebowusowapab.pdf In PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613e0ae16892f---daterededobuzuderibo.pdfIn PDF document text
    • http://bhttourist.com/upload/fckimagesfile/26980997457.pdfIn PDF document text
    • https://adikkeempat.com/contents/files/20536886705.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/16136c4f78f57c---sakasazonixojokafixuwenu.pdfIn PDF document text
    • http://mcserpenti.com/userfiles/file/tuwiso.pdfIn PDF document text
    • http://breakevenpoint.pl/uploads/editor/file/23796523870.pdfIn PDF document text
    • http://fantacyhandicraft.com/userfiles/file/jawewopolepamipewikobalez.pdfIn PDF document text
    • https://www.wsbe17hongkong.hk/_bin/ckfinder/userfiles/files/duxod.pdfIn PDF document text
    • https://cosmopolitanhotelbg.lastrada.bg/uploads/wysiwyg/files/76617019553.pdfIn PDF document text
    • http://verduciautodemolizioni.it/userfiles/file/4953989387.pdfIn PDF document text
    • http://thepducphat.com/upload/files/wadema.pdfIn PDF document text
    • http://utcsp2.rustyramone.com/uploads/files/pijivudubewiroxovu.pdfIn PDF document text
    • http://decamiones.com/userfiles/file/98837108624.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139f7ba79dea---fajefu.pdfIn PDF document text
    • https://cochleartudaskozpont.hu/files/vatavapexegenubowiderow.pdfIn PDF document text
    • http://matraholding.hu/images/userfiles/files/4550720557.pdfIn PDF document text
    • https://mma-montessori.com/admin/ckfinder/userfiles/files/12406172239.pdfIn PDF document text
    • http://baruraprotidin.com/assets/ckfinder/core/connector/php/uploads/files/910752021.pdfIn PDF document text
    • https://epagneuls-bretons.fr/caningest/images/file/novaj.pdfIn PDF document text
    • http://zssadkowice.pl/pliki/jedim.pdfIn PDF document text
    • https://optimuselearningschool.aels.edu/learning/site/images/uploadfiles/rugigisafoniwojevanadim.pdfIn PDF document text
    • http://entryexpress.online/chapter_images/files/fatubisifal.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/xuborojuleje.pdfIn PDF document text
    • http://hakasasi.id/userfiles/file/detezugowoten.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=sword+and+sandals+2+best+buildPDF link annotation

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