Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8fe4fe4afe8a98b…

MALICIOUS

PDF

42.9 KB Created: 2021-06-23 21:19:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 57819bbe676b06271a0a4f8e67f08fbb SHA-1: a79020d69b78291022c376fb06cfb06b96100f70 SHA-256: d8fe4fe4afe8a98b18d971259c2e9162577d793b0fb9fe1afe8deeaa89593f37
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress upload directories, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8113

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 http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607d3c1f37dd5---vijizibezag.pdf In PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c7c31bb5a2---19612294024.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5799c16f49---30523994376.pdfIn PDF document text
    • http://tunglamgarden.com/images/fck/file/31725180588.pdfIn PDF document text
    • http://agendaalzheimer.org/files/galeria/files/najipematejugakifujit.pdfIn PDF document text
    • https://remoteyourstaff.com/calisma2/files/uploads/66786422925.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c20c1baf463---84768267079.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/5199d555b8f6edb86d71814b9a22300d/sejagopuxa.pdfIn PDF document text
    • http://osc-pribor.ru/products_pictures/file/27710526932.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ab790dc9695---66770555873.pdfIn PDF document text
    • http://dui-antidote.net/images/userfiles/file/67566911403.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609edb581d082---gexatebiwagelafad.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/uevi3rq4uend720lkb4e723to2/genapesubewaxafasenadonad.pdfIn PDF document text
    • https://confetti-seasons.ru/upload/files/67621170975.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9d4ed6893---55691046899.pdfIn PDF document text
    • http://hutbephottaihaiphong24h.com/upload/files/23078300963.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a115e2cc03c---zodavikumaxovekikojubop.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/06c6f6d7b94b70d00b13f3625dc077c7/sawona.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=hurricane+motion+gizmo+assessment+answersPDF link annotation

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