Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c4bb3aa60f3c1fb…

MALICIOUS

PDF

46.8 KB Created: 2021-10-08 21:57:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 97198f5acda837a4fd7233a364f7f2a4 SHA-1: c1ddc090828f5abb2675e541f8226448607cc91a SHA-256: 5c4bb3aa60f3c1fb629b295af8de221f865823e7eb3f310ebd767d86170b9e89
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to potentially compromised websites and disposable hosting. The presence of external URIs and link farm characteristics suggests an attempt to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6137

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://oniceh.ru/uplcv?utm_term=gluten+free+party+appetizers PDF link annotation
    • https://editora-arara-azul.com.br/site/admin/ckfinder/userfiles/files/zewagitivijutasumevov.pdfIn PDF document text
    • http://www.saveurspoitoucharentes.com/admin/ckfinder/userfiles/files/3122285545.pdfIn PDF document text
    • http://host.keraladreamhomes.com/~viswabrahmathach/admin/fckeditor/editor/filemanager/connectors/php/userfiles/file/sawiki.pdfIn PDF document text
    • http://craft-personal.de/userfiles/file/71812169555.pdfIn PDF document text
    • http://vigen12.com/userfiles/file/tujav.pdfIn PDF document text
    • http://hstairan.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/zododaboboxojubokowoboda.pdfIn PDF document text
    • http://web-news.eu/www/pkpar/userfiles/file/73032270432.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615b9d077af25---62654433023.pdfIn PDF document text
    • https://www.disbel.es/ckfinder/userfiles/files/63603597330.pdfIn PDF document text
    • http://verduciautodemolizioni.it/userfiles/file/kakagere.pdfIn PDF document text
    • https://viktorina.ledoritulys.lt/files/gukukerakukatila.pdfIn PDF document text
    • https://tonerihned.cz/userfiles/file/66059315582.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/bll3jhugnh3afr6533937rg3dp/38884937280.pdfIn PDF document text
    • https://promtour-rural.ro/userfiles/file/soziguri.pdfIn PDF document text
    • http://www.thunderesp.com/ckfinder/ckfinder.htmlfiles/mamotag.pdfIn PDF document text
    • http://lacasedescaraibes.fr/file/19106106948.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16155fab1cf96c.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/16159a232c332a---52556853481.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1615b3bf0b6292---89526426537.pdfIn PDF document text
    • http://toflight.mobi/attachment/ckeditor/files/10e18662033e8abae271fa93599b9be5.pdfIn PDF document text
    • http://nhac.ditimchanly.org/Images_upload/files/bigibiz.pdfIn PDF document text
    • http://xn----8sbkebltdkywd.xn--p1ai/ckfinder/userfiles/files/70358802908.pdfIn PDF document text

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