Malicious PDF — malware analysis report

Static analysis result for SHA-256 41c9682a81ec62b5…

MALICIOUS

PDF

67.3 KB Created: 2021-08-15 00:42:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 0a13342a65ea3e3d9ce27d1a8fd099ec SHA-1: eaa0c5ab30897b85ca99998c36f5f0ee7334637e SHA-256: 41c9682a81ec62b5e073b66b9bf1c16a1c780fab4558a45117e625a566c24fa2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm with numerous URLs pointing to compromised WordPress sites, suggesting an attempt to distribute malicious content or conduct phishing. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the structure and URL patterns are consistent with malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9558

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://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/5f41edb560c82cdc03d2ecf89ff42b8d/44889192317.pdf In PDF document text
    • https://warungmimpishio.com/contents//files/libidudibunuxefamufotito.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/7e19d36cd51662b04d0776510168d177/vofewarodufoz.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f1a3f115c5---6362930126.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/16114b36a55e1f---19583991527.pdfIn PDF document text
    • https://eirai.org/editor/ckfinder/userfiles/files/61680848643.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16102c2013489e---40982461522.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/jixezobufezofizebelus.pdfIn PDF document text
    • http://birzebbugastpetersfc.com/files/file/kupud.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/60757e33d4af84cf48de9c7dbd4eee50/zinikis.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160f34dc86cd92---seboninijadajediganobo.pdfIn PDF document text
    • http://nowator-zpu.pl/userfiles/file/vunuturigidovubikopaxav.pdfIn PDF document text
    • https://poolpoint.be/uploads/file/fulukenisibiposog.pdfIn PDF document text
    • http://emiem.pl/public/upload/ckfinder/userfiles/files/94220765523.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cac9c673810---vovugekaxovis.pdfIn PDF document text
    • https://bruceleevideos.org/images/file/mokasovol.pdfIn PDF document text
    • http://tahi.hu/ckfinder/userfiles/files/41727797397.pdfIn PDF document text
    • http://rspon.pl/images/wyswig_images/file/40359128369.pdfIn PDF document text
    • http://taborcapitalpayment.com/clients/d/d0/d0a3925ee25d0adc8806453b18bccccc/File/mojopijodazofiba.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afd39c09003---bironuvuxuronazavovoramo.pdfIn PDF document text
    • https://manuscripthandler.com/userfiles/file/sowivikudejep.pdfIn PDF document text
    • http://fygl.net/uploads/file/11190435544.pdfIn PDF document text
    • http://makingtheturngolf.com/clients/9/92/925d9bae4ecf380f28dbe0e1390c16eb/File/feviwanarosedim.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=animal+mods+for+minecraft+pePDF link annotation

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