Malicious PDF — malware analysis report

Static analysis result for SHA-256 cee538256c06ad7d…

MALICIOUS

PDF

70.2 KB Created: 2021-08-03 22:38:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 1ff813961405f0f090b8605bc0fd50d0 SHA-1: 07ac180df3a26a941154197d77bc967d86c256ec SHA-256: cee538256c06ad7d1d0632613981882a4dcf3504ec5a4e9b2a70b3f98f83ace1
154 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to domains that are either compromised WordPress uploads or disposable hosting, suggesting a link farm designed to direct users to malicious content. The presence of multiple distinct hosts and UTM parameters further supports the link farm and SEO manipulation aspect.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8734

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://syteq-pro.com/userfiles/file/zuvipebowinoxabilofobom.pdf In PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610270e5e3f5e---51887529584.pdfIn PDF document text
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/shopm1s4vavh2o0rf2psmhpqep/48275639219.pdfIn PDF document text
    • https://www.temsilcifirsatlari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160748d5443d45---vusumematidegom.pdfIn PDF document text
    • http://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/67533868275.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/diloxafiwuroxamukaboza.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/25c2ea87d003b5f08e5347f70e439bcf/naxufoz.pdfIn PDF document text
    • http://hiredriver.com/uploads/assets/files/togadixilapiwik.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606d46cb40290---wumepukarugiguritika.pdfIn PDF document text
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a7d87f856f0---luguragederunarutabixowek.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/4t0mtd46line98lec869gp7pjd/98619178092.pdfIn PDF document text
    • https://oncallanatomist.org/ckfinder/userfiles/files/pevekewen.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/eudgn1r6bfinltmk2u1n5eb50n/lutelimewizogobamega.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608742d489392---9336797344.pdfIn PDF document text
    • http://www.mezmat.ru/ckfinder/userfiles/files/pevurexelo.pdfIn PDF document text
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/160facc5c6f3aa---44400906925.pdfIn PDF document text
    • http://radissonhoteltraining.com/userfiles/file/29230270722.pdfIn PDF document text
    • http://archissimo.eu/userfiles/files/1822391506.pdfIn PDF document text
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070ffa82de4e---pikukunozudexupu.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-6-15/20210615234619666153.pdfIn PDF document text
    • http://elvirajogsi.hu/ckfinder/userfiles/files/64167758572.pdfIn PDF document text
    • https://tecnicadovolante.com/images/file/wokezitubefez.pdfIn PDF document text
    • https://gamma-electronics-eg.com/userfiles/files/jakisudaneju.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=what+is+the+most+accurate+translation+of+the+catholic+biblePDF link annotation

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