Malicious PDF — malware analysis report

Static analysis result for SHA-256 922a60005e5c3f2e…

MALICIOUS

PDF

59.3 KB Created: 2021-06-21 10:16:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 9428dd8b036f47f2718ec35cbe3a0464 SHA-1: 4cab9d554cf061bb20dcb0f8a3ca7fad495c9c76 SHA-256: 922a60005e5c3f2eda06e6d3b31fbd859f280de0f08d63b185a0405cb37d6959
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple embedded links that lead to compromised WordPress sites, serving as a link farm for potentially malicious files. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The presence of URLs with 'utm_term' parameters suggests a lure to download specific software, such as 'pes 2020 ppsspp 500mb', which is a common tactic for distributing malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9433

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://queure.ru/uplcv?utm_term=download+pes+2020+ppsspp+500mb PDF link annotation
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16081d3eb90b0e---65744881882.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/23e5baf5ddab202535b442d5bc470c29/38340599709.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c86dcc28a2---24855978086.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/cf6186ad559ddee8bf69858ef684f7c0/lanija.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/343852ccca5d4ef889c0067571f4ebb5/dirisapeganibuwisodivel.pdfIn PDF document text
    • https://webtechnocrats.com/upload/file/kereworo.pdfIn PDF document text
    • http://qianxish.com/ckfind_image/files/sideluvuneji.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba5c4326cfa---tasenudolinuvawi.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078a90a3cda3---83612733991.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/tmov171f92o6nlrvk7bon09ei3/lixim.pdfIn PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1606c92dc82d6a---85591742667.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/ae56a268bde7dacd3073360fce988bce/54927640470.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/c47df42beffea56c7afb96778b602422/wiruraxufol.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160741f03a438b---24334466824.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/9657c45254e7eb1b93a3081155d9a318/gawas.pdfIn PDF document text

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