Malicious PDF — malware analysis report

Static analysis result for SHA-256 062774aa7ec2a517…

MALICIOUS

PDF

96.0 KB Created: 2021-06-19 17:23:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 8bf227ae1b767862e7469adc7f09e810 SHA-1: 1734668dac120e0a11c7b4a1be9b3ee1aea1ed24 SHA-256: 062774aa7ec2a5175f99cb84044cf2fafe216ee3143c686504347b8deca6f5d5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that point to other PDF files hosted on various websites, many of which appear to be compromised CMS uploads. This structure suggests a link farm designed to redirect users to malicious content, likely for phishing or malware delivery. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8806

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://proxima-design.cz/files/file/47475704255.pdf In PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/160726aa8cd0d9---78332939443.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/v11uoq0kso7mei0u4fs62gl9l5/pevunajo.pdfIn PDF document text
    • https://dcoderesearch.com/uploads/wuxumib.pdfIn PDF document text
    • https://lapalettedesarts.fr/gestion/file/73238638346.pdfIn PDF document text
    • https://kajariaadsevents.com/admin/uploads/file/35647332934.pdfIn PDF document text
    • https://treasurehunterdetectors.com/ckfinder/userfiles/files/85189440704.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abe598174d1---1339555629.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/34cb06dff7e27fe78b6bd093b48d45be/sibis.pdfIn PDF document text
    • http://congtyvima.com/images/Download/99567578613.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607580e6928ef---25057591051.pdfIn PDF document text
    • http://short-story.ru/upload/file/6290265734.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/317a5ac95b8d31125d24fa3e3a7efe04/jafevomimukimujen.pdfIn PDF document text
    • https://salvatoredivilio.it/userfiles/file/futizawi.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608605c4ca255---jefafupagosusakulitima.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/4rv06sf757kr7aidq07vsqbfdt/vilemorusijizop.pdfIn PDF document text
    • http://svsteinfurth.de/radsportfiles/file/3748116878.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=no+intro+snes+rom+setPDF link annotation

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