Malicious PDF — malware analysis report

Static analysis result for SHA-256 555b50a3a2b431c6…

MALICIOUS

PDF

74.8 KB Created: 2021-06-28 16:35:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 9bb67ae812e719631a4722d113e9a55b SHA-1: 46b05f783166fa9933e7a6728813a2ac9546063a SHA-256: 555b50a3a2b431c6bade9b6dd5ed945475974aa28c8c12eda943f168b60f7df3
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 numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The presence of embedded URLs and the nature of the heuristics indicate an attempt to redirect users to external, untrusted resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6135

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://pistant.ru/uplcv?utm_term=applications+of+machine+learning+pdf PDF link annotation
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16073f54d3ed9f---32951779183.pdfIn PDF document text
    • http://smolensk-bakaleya.ru/userfiles/file/nibifawedarisulepusim.pdfIn PDF document text
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/1css3rsful5hmt8es7ger0e9j7/57255860709.pdfIn PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/eda6060e6e08e1272a71abe5aeea8eae/16813861402.pdfIn PDF document text
    • https://mobiligennari.com/userfiles/file/82807573236.pdfIn PDF document text
    • http://twxcd.com/img-aim/files/65265510997.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16082ff7c807fb---64412552449.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/kfjhvab4rqtpou74dpm2vaqnl2/18647616723.pdfIn PDF document text
    • https://stef-nancy.fr/upload/document/wetogoxuxuja.pdfIn PDF document text
    • http://mea-travel.pl/userfiles/file/tuxugabujovikizububenip.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/5aa60ed8c33d1c2a4fbe82d5aa1bac12/11858685432.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/16081f97c69ac2---58031737929.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074d1371c702---26538956575.pdfIn PDF document text
    • https://mmagame.com/userfiles/file/tuxazonure.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/1a5957a41f8b15098549a6c9d44e2ddc/40544981886.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2313576f4f---jotiradoraripozu.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/160900d8c43f83---renataraz.pdfIn PDF document text
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/160898db95f99d---gatonagun.pdfIn PDF document text
    • https://autotrans911.com/thread/admin/uploads/file/67766244724.pdfIn PDF document text
    • http://millecolori.it/images/file/nibetukemep.pdfIn PDF document text
    • https://baohohoanglong.com/userfiles/file/tepawew.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/ca6bac38b34cd8e27b304f24f3f14445/16883565008.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160708e3a7d81d---tetidemisujawevowetekaxa.pdfIn PDF document text

Open this report in the interactive analyzer, or submit your own file for analysis.