Malicious PDF — malware analysis report

Static analysis result for SHA-256 656ab60fdf468b5e…

MALICIOUS

PDF

55.4 KB Created: 2021-09-19 21:10:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: eaf1edec3d8c37d07a6fa2ce584153e2 SHA-1: 0be478af559f1d67e591a7ae02cdb0dd4ada0e67 SHA-256: 656ab60fdf468b5eb5189723537974e1bb50dc4489588eb97569069ffbe8ee5a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier further support its malicious nature. The file's structure and URL patterns suggest it is part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5305

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=bully+apk+data+mod PDF link annotation
    • http://studiotecnicoforace.eu/userfiles/files/zezaxawasebat.pdfIn PDF document text
    • http://dpholding.ru/uploads/files/nutezubudazom.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/161360450119b3---88114035582.pdfIn PDF document text
    • http://qdjshg.com/files/file/luritidosubidizuzipatubu.pdfIn PDF document text
    • https://gbagencement.fr/uploads/file/11475948950.pdfIn PDF document text
    • http://hagelkonzept.de/userfiles/file/1363331414.pdfIn PDF document text
    • https://korovin.org/site/img_ufiles/tomoxifunu.pdfIn PDF document text
    • http://arenabilardo.com/data/_files/kabitoladawixokozup.pdfIn PDF document text
    • http://agrocare.hu/ckfinder/userfiles/files/kafopuladedamegug.pdfIn PDF document text
    • http://cu-mbc.com/ckfinder/userfiles/files/16780668018.pdfIn PDF document text
    • http://pkpneu.cz/userfiles/file/jusameburefufiwuraga.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/082315511788.pdfIn PDF document text
    • https://cortemadera.com/wysiwygfiles/file/duzirobanuxonunipuwejo.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/16146f938527e3---75474629677.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141107697f7f---sujalerewevatazum.pdfIn PDF document text
    • http://giustizianuova.it/userfiles/file/vipodoxowoxagaxetamoseja.pdfIn PDF document text
    • https://chungcungoaigiao.vnpec.xyz/uploads/files/44045853110.pdfIn PDF document text
    • https://careersourcechipola.com/files/public/gawelanexula.pdfIn PDF document text
    • http://sovaimm.it/userfiles/files/70898196060.pdfIn PDF document text
    • http://ijfbn.com/editor_up/vinugidapisexodesagipijub.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/16144585608659---15889830957.pdfIn PDF document text
    • http://jerseybankruptcylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/22148419089.pdfIn PDF document text
    • http://studiodebiaggi.eu/userfiles/files/fonupotorideta.pdfIn PDF document text

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