Malicious PDF — malware analysis report

Static analysis result for SHA-256 61a7a64bb97fb7f5…

MALICIOUS

PDF

62.3 KB Created: 2021-09-19 00:24:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: cf6470686b54c1830f86594faee2060b SHA-1: 249691311718d310d9b204ef8860a2c926a7d880 SHA-256: 61a7a64bb97fb7f5b0a570ef4ca6d3e8711d4667f046f896f6353daa3dc42c90
154 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a specific ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The presence of a 'utm_term' parameter in one URL suggests a phishing or spam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6290

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://oniceh.ru/uplcv?utm_term=how+to+remove+android+apps PDF link annotation
    • http://spellenindex.nl/images/uploads/69383099661.pdfIn PDF document text
    • http://hoaiduc.edu.vn/ckfinder/userfiles/files/wesigale.pdfIn PDF document text
    • http://mylivediamondinventory.com/uploads/files/bezizimewisuge.pdfIn PDF document text
    • http://elistaprezentow.pl/userfiles/file/lujizoba.pdfIn PDF document text
    • http://ph-easycome.com/userfiles/file/nobavapanijapo.pdfIn PDF document text
    • http://mwbright.com/upload_fck/file/2021-9-16/20210916120712341219.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/6e70891af9deee9e8fefb8ae6a3fed62/sejomedi.pdfIn PDF document text
    • http://villaelen.it/userfiles/files/39421756342.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/161385f6ced914---puramalovaluzapupitidet.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614654bdc6709---94575910652.pdfIn PDF document text
    • http://3m18.com/images/editor/files/vipudufazabokuvipe.pdfIn PDF document text
    • https://luxm.pl/userfiles/file/domijofotusijabo.pdfIn PDF document text
    • https://interference.ajoda.eu/userfiles/files/ziriwovemusatawozum.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613fe20c1d068---13336436069.pdfIn PDF document text
    • https://onecre.com/images/content/files/99544908977.pdfIn PDF document text
    • https://universal4shipping.net/userfiles/file/diput.pdfIn PDF document text
    • https://delcinfo.ru/img/files/files/88018093268.pdfIn PDF document text
    • https://sogelec-eng.com/files/ckfinder/files/15145253164.pdfIn PDF document text
    • http://esebtekstil.com/resimler/files/29115590223.pdfIn PDF document text
    • https://taiwancy.com/app/webroot/userfiles/files/mudikemowawibe.pdfIn PDF document text
    • http://forma8.kz/ckfinder/userfiles/files/43025663852.pdfIn PDF document text
    • https://iohrp.org/f_files/files/52083974419.pdfIn PDF document text

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