Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6a757cb0eab821c…

MALICIOUS

PDF

48.4 KB Created: 2021-09-08 06:06:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 40e50fce988b9a8ac24f7a35fd53dbdc SHA-1: 4015d60db9b8b14d21db9f927d9e95af4a15ed72 SHA-256: a6a757cb0eab821c74ea34cec01ffb36d39661e677ef33bb9af753b4766344c1
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, which is often used to redirect users to malicious websites. The heuristics indicate the presence of a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting an attempt to distribute phishing content or malware. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5740

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://medvor.ru/uplcv?utm_term=mcgraw+hill+ryerson+grade+11+chemistry+textbook+pdf PDF link annotation
    • https://triangle-electronics.com/assets/userfiles/file/85072896870.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16094e8ad9a7c2---24492650324.pdfIn PDF document text
    • https://icon-studios.com/userfiles/file/63502118637.pdfIn PDF document text
    • https://superchills.com/userfiles/file/25105653294.pdfIn PDF document text
    • https://sandzak.best/wp-content/plugins/super-forms/uploads/php/files/6be3d65b3379e672ae95c9ebe6698ea9/48147501353.pdfIn PDF document text
    • http://worldtile.net/jangheung/userfiles/file/dipuzij.pdfIn PDF document text
    • https://www.carnesvarejo.com.br/assets/ckfinder/core/connector/php/uploads/files/3542067530.pdfIn PDF document text
    • http://terezmisszio.eu/files/file/bovosizebubafox.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/f13d2c1cb3a7c6d7b5f74151d5c7407c/9540836392.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a5984aef117---kokasodafufelutifatudor.pdfIn PDF document text
    • http://bycongroup.com/UserFiles/file/77162989279.pdfIn PDF document text
    • http://onlineticketreview.com/images/file/jujajozozir.pdfIn PDF document text
    • https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/52spuuo403abu2bmpuquriakd8/42456879022.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2257c9423---kagukugu.pdfIn PDF document text
    • http://docando.es/js/ckfinder/userfiles/files/60822680453.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c2b6367f9ea---xulilubowuzakomonoga.pdfIn PDF document text
    • http://neonatal-surgery.ru/userfiles/files/xadexufazojanukuguwojodov.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afd16d0fc93---kitigexifosevugopo.pdfIn PDF document text
    • http://www.aportecnica.com/imagenes/editor/file/lukojibiduvavixigog.pdfIn PDF document text
    • http://songiadahoaian.com/upload/ck/files/digilalufutewot.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137ed158b065---ragosokunov.pdfIn PDF document text
    • http://whkmradio.com/userfiles/file/moxet.pdfIn PDF document text
    • http://senseoftourism.dk/userfiles/file/66749839467.pdfIn PDF document text
    • http://gianniarnaudo.com/userfiles/files/68807097197.pdfIn PDF document text
    • http://tano-cable.com/d/files/70792043787.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084d7abda50c---92798796660.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/58aaf95812bcb70918b148628367a82f/27593261823.pdfIn PDF document text
    • https://leganordavigliana.it/uploads/file/sesijis.pdfIn PDF document text