Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d3b909340bf7df8…

MALICIOUS

PDF

54.0 KB Created: 2021-06-14 08:10:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 53abe186627061d95700316910e5cbed SHA-1: 41ce8b04b32b81c6702640bf8bfb4ef14f9e1084 SHA-256: 1d3b909340bf7df8322160a5ac06ab600443bf6421c6c4644ca992ea9b9b076a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to various compromised websites, likely to trick users into downloading a fake game. The presence of embedded URLs and the nature of the heuristics suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9464

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://coretry.ru/uplcv?utm_term=pokemon+let%2527s+go+pikachu+gba+game+download PDF link annotation
    • http://agataklimowska.pl/userfiles/file/fovepijasafelog.pdfIn PDF document text
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/ht1vk4ujr1hu826gi4519fc2nc/25430479912.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160893072ae165---fufololixenazu.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/d1t8a4akottdmd1stvum6nnu1i/romukezezim.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16079f251da4cb---sosekoguwad.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a40e7a10596---bezepomelekadodusipiso.pdfIn PDF document text
    • http://yossy.biz/userfiles/file/82902103002.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/af3d4ae7ff9cbff6fd49b331e316fd20/mexidez.pdfIn PDF document text
    • https://gamedunyasi.com/calisma2/files/uploads/71604649355.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5876d5feb07db3e774d50b1b4a97ecd2/zapirubobozaz.pdfIn PDF document text
    • http://flexa.cz/docs/file/gojebokusonobuvomozater.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/b41aa3556a68ad84f0324f10d3847405/ridota.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afcc3bb8639---mabop.pdfIn PDF document text
    • http://shethof.ch/cgi-bin/dynamisch/file/vuwepekurisiwagawigu.pdfIn PDF document text
    • http://reicar.dk/userfiles/file/85340182378.pdfIn PDF document text
    • http://hanhthien.net/uploads/file/tutinofadonib.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609c775007285---81784001444.pdfIn PDF document text

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