Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7a708cda53cbf38…

MALICIOUS

PDF

48.0 KB Created: 2021-06-21 01:48:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 7d16b04a70ed8f73ce603c5c6f83d790 SHA-1: 40ce3e9f39e4084be0960f0f77dedd329bf1f669 SHA-256: d7a708cda53cbf38bf17dcde76a1bb9d88027c9c5355425417760ad3286829c8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm pointing to multiple other PDF files hosted on various domains, many of which appear to be compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the structure suggests it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7228

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://soalmatematik.com/userfiles/file/bevakutugufumubijut.pdf In PDF document text
    • http://podwierzba.eu/ckfinder/userfiles/files/gorizaz.pdfIn PDF document text
    • http://altinay-law.com/images/file/74069081608.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/ae685a9f93618ffcf4207801b2dd1bee/83249815234.pdfIn PDF document text
    • https://ekselantechnology.solutions/ckfinder/userfiles/files/47788705217.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a4cc753891---febud.pdfIn PDF document text
    • http://timelessmebel.ru/wp-content/plugins/super-forms/uploads/php/files/47b8caba3250ce204791994495850d12/60228515924.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/528295f0a5392b2b1215bdb09f632912/nokipetadogigetutu.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16084efad91f49---pusivi.pdfIn PDF document text
    • http://dighakanchaninternational.com/FCKeditor/file/85619655151.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160bfa84bb02db---fezumudi.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/87189123664.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/b4nbanqtjjjmdgiukpue93tgd4/19092971465.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/jbuniqbn6bi73la0bhpdmke301/faxilelixosojagobozuruz.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/38387384683.pdfIn PDF document text
    • http://macautemple.com/userfiles/file/46432968151.pdfIn PDF document text
    • http://eastmoorclassof1970.com/clients/4/43/4343e427eb1b0a0668350338a4d6b623/File/7022920827.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=harry+potter+goblet+of+fire+full+movie+sub+indoPDF link annotation

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