Malicious PDF — malware analysis report

Static analysis result for SHA-256 a27da271e6993189…

MALICIOUS

PDF

50.9 KB Created: 2021-09-24 16:34:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 271ecc835b87ca00cba5b4038c8d0dd8 SHA-1: 73b3cabbb977d387ae28e6e0e756662c1efc581c SHA-256: a27da271e69931895cd81fa133a3aed2a523887dfce40904ccc7433844e49c60
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with a heuristic specifically flagging it as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially malicious sites, aligning with phishing or malware delivery tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6796

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ourpreferred.com/userfiles/files/sowumutaro.pdf In PDF document text
    • http://andersonlawdecorah.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/benesu.pdfIn PDF document text
    • http://vsrru.ru/userfiles/file/xinijogefibosiwonuvix.pdfIn PDF document text
    • http://laihoawedding.com/app/webroot/upload/files/kuwiganomajuworulegu.pdfIn PDF document text
    • https://ou-ravda.com/ckfinder/userfiles/files/5461348353.pdfIn PDF document text
    • http://www.keizerco.nl/userFiles/file/rojubezixibusik.pdfIn PDF document text
    • http://irodaszer.lukinserv.hu/file/16473991013.pdfIn PDF document text
    • https://ultralloy.net/upload/files/36390377980.pdfIn PDF document text
    • http://architettogherardi.eu/userfiles/files/86849042235.pdfIn PDF document text
    • http://ansonseatery.com/uploads/files/libabakiniremilisisowewuv.pdfIn PDF document text
    • http://www.southforconstruction.com/frontend/web/ckfinder/userfiles/files/nikobupalomuragoko.pdfIn PDF document text
    • https://dalycity.com/wysiwygfiles/file/rominaxilerew.pdfIn PDF document text
    • http://imosa.asia/uploads/files/202109180506407406.pdfIn PDF document text
    • http://serbanindustrialconstruct.ro/uploads/files/solexekom.pdfIn PDF document text
    • http://svaz-podnikani.cz/files/file/pisuvuripugob.pdfIn PDF document text
    • http://tanriovermensucat.com/uploads/genel/files/95615346645.pdfIn PDF document text
    • http://geodavidepini.it/userfiles/files/toginulebikagevep.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16147df2af381b---59132568580.pdfIn PDF document text
    • http://skrutit-probeg.ru/upload_picture/file/20151195437.pdfIn PDF document text
    • http://lamgi.pl/ckfinder/userfiles/files/didimigabulusis.pdfIn PDF document text
    • http://aesg2edcv.handylover.com/upload/files/juwomugami.pdfIn PDF document text
    • https://optimuselearningschool.aels.edu/learning/site/images/uploadfiles/vogavuluruzixuroduwolez.pdfIn PDF document text
    • http://worshipedia.net/sites/default/files/file/33855749516.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/38236971b19154945012f5865c022744/tazokikus.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=jailbroken+firestick+live+tv+appsPDF link annotation