Malicious PDF — malware analysis report

Static analysis result for SHA-256 d074306a741f6070…

MALICIOUS

PDF

132.0 KB Created: 2021-06-22 17:00:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df77714b931e49501f89444aeb08f8fc SHA-1: 4b532f749e069f96adf9f39fb42d5e882e800e49 SHA-256: d074306a741f6070f49881be214ebae8d6d74a98e40c590589c3ebaa23be25a0
154 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple compromised WordPress upload storage locations and disposable hosting sites. The embedded URLs and the nature of the heuristics suggest this PDF is designed to lead users to phishing or malware-hosting sites, likely as part of a broader phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9671

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 http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7mueimh2okcopsdl3tak5gk1u2/jelefavuzujewapitonumali.pdf
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/ftv27u5ip3s7htdjb70fs5vhi2/68592708572.pdf
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/77edfaf91032749ae4c7adcb576bc41f/3080045187.pdf
    • http://mu-rrrc.com/userfiles/file/91865425613.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/tqcqt3cg25e7d2ns3cmgtul4to/65259956773.pdf
    • https://noihoithanhtuan.com/media/ftp/file/lomurivudun.pdf
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/e54d62f2eb9aad0df03b31554887c723/56100736976.pdf
    • http://mulroyenvironmental.ie/userfiles/file/98401482035.pdf
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607c664657874---25218939729.pdf
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/02d4ea4da2cc226849decfce174f5432/sulebifakale.pdf
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160b46150b2554---furutitikojozuladodaxe.pdf
    • http://lab4050.com/upload/editor/file/fowemaxudowubogaxe.pdf
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/a1d5c7bfa53c06ea151a786755d0a76c/82033850829.pdf
    • https://ikima.fr/uploads/file/wunoleretazujetot.pdf
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/04ae5b2d954c5028b467ad2e6d2af8a7/xunudiladifonadudepazawav.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=fundamentals+of+momentum+heat+and+mass+transfer+solutions
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001fcf0.bin
a58857f39c1ef125dcfadc60ab92186939ca8148c285f797212f608859654532		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1FCF0 5104 bytes

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