Malicious PDF — malware analysis report

Static analysis result for SHA-256 df6104b5827fa09f…

MALICIOUS

PDF

58.1 KB Created: 2021-07-07 17:22:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: d526afc14557cb139774c508cfaa95f7 SHA-1: 9e5beadb8120fad745569e21e4d2785061ae970c SHA-256: df6104b5827fa09f995bcecd420a3cf841a261a266898b9d774a2e1463295a8c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating it is likely a phishing or malware distribution attempt. The document contains numerous links pointing to external websites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a link farm designed to redirect users to malicious content. No scripts were extracted, but the presence of external links strongly implies an attempt to lead the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5356

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://inwebjor.ru/uplcv?utm_term=rock+of+ages+west+end PDF link annotation
    • http://takeacode.eu/user/d41d8cd98f00b204e9800998ecf8427e/file/tupaxuvisulif.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/002552fac80dffbc1148eec12e104ec5/20219023196.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16097c3f42891b---kugobakubefavuxamet.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160807cd4a2dc9---40228972858.pdfIn PDF document text
    • http://anhuizpyy.com/upload_fck/file/2021-5-11/20210511081205154797.pdfIn PDF document text
    • http://anhuicrew.com/upload_fck/file/2021-7-2/20210702030449794864.pdfIn PDF document text
    • http://www.nomorcantikjoss.com/file/muzemo.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/ramaxazimikutizuxisaj.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/5di2g7qjgeejn1ti3m9shgklra/wudonuvikerelikefa.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa855c49de---14291963736.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b88aed9097---21300358909.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/81a61b05698fd72000ead5b08a88c4aa/zezixumuto.pdfIn PDF document text
    • http://wphs69.com/clients/1/13/13dd0a1135c99f886ff4006aa3c820ba/File/wajunumuzeji.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160c28b4024b3e---nirorijajetekuladovanin.pdfIn PDF document text
    • http://bridgestone-ice-cruiser-7000.ru/ckfinder/userfiles/files/87467002084.pdfIn PDF document text
    • http://alda.pl/ckfinder/userfiles/files/vojixefe.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a9360d02bbe---rufamipasunimijakaduva.pdfIn PDF document text
    • https://loctra.net/userfiles/file/85961469329.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/27012685815.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/df842018b0e02a6251fe04d729e0eb57/dukimu.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/5aee74a70e4ee723822d00ea078a5339/12664579380.pdfIn PDF document text
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079887849404---60159576088.pdfIn PDF document text
    • http://elm3rad.comfile/90943434970.pdfIn PDF document text
    • http://pttaccounting.com/userfiles/files/81398283048.pdfIn PDF document text

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