Malicious PDF — malware analysis report

Static analysis result for SHA-256 5aae01ac8e8871be…

MALICIOUS

PDF

70.6 KB Created: 2021-07-02 23:55:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ae63de5cfeea28c5ec743ca59b34c32b SHA-1: 7e6d3294994a6785f2701ea2e15be024f9816b90 SHA-256: 5aae01ac8e8871beecce7f016f1eb1273936405bafe744f7647d08e69bf14b5d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs that point to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier further indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, and the document body was unreadable, limiting further analysis of specific payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7210

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://mzr-avocats.com/buddha/ckfinder/userfiles/files/sefifixetezudifukor.pdf In PDF document text
    • https://ludifrance.fr/userfiles/file/libalusanul.pdfIn PDF document text
    • http://ac-kenigsberg.ru/files/file/guzasaremuduteboxapuz.pdfIn PDF document text
    • http://myshopgroup.com/userfiles/files/bojigokutujigeda.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/1aa0dafc4c09f274b50bf202a2eb703e/37941115682.pdfIn PDF document text
    • http://www.hydro-tg.pro/upload/file/88106468616.pdfIn PDF document text
    • http://vytvarnyobchod.cz/UserFiles/File/76660752886.pdfIn PDF document text
    • https://trellisdundee.com/wp-content/plugins/super-forms/uploads/php/files/464a61f121249308e4255309d5acd675/mugexozatowunili.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089755a8ec6c---49561527309.pdfIn PDF document text
    • http://rana-international.com/userfiles/files/dafemotizusifonufezuzi.pdfIn PDF document text
    • https://iqmuseum.mn/uploads/files/xomizuz.pdfIn PDF document text
    • https://vieclambanhang247.com/upload/files/37960432128.pdfIn PDF document text
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/3fa5927ce86a9f5f6aace68d8da21c31/gutuvizalujulazutulofa.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aa8c113c3ce---58744191722.pdfIn PDF document text
    • http://xn--12cfu9bc1efac9a9azfdsb7b9d1f0j.net/ckfinder/userfiles/files/91764066046.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/160a47556717fe---basofuparakiz.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a53ba63f0c8---gawoxusemo.pdfIn PDF document text
    • http://soldresold.com/Shradhdha-Mehra/soldresold/final/ckeditorimage/files/69294391670.pdfIn PDF document text
    • http://fra2ange.it/userfiles/files/bitukadipemotosovabi.pdfIn PDF document text
    • http://childconnect.com/swi/fckfiles//file/23505660681.pdfIn PDF document text
    • http://krzeptowski.pl/file/fomenukesevejeg.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=adc+dryer+commercial+troubleshootingPDF link annotation

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