Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd072d0964cff05d…

MALICIOUS

PDF

48.6 KB Created: 2021-08-07 10:13:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-03
MD5: 6282bdf923700de42c33e21c86fc2c42 SHA-1: 35d67c2163ad6d102f032199e32f03a0a901f5fa SHA-256: fd072d0964cff05d5e440910d9379f8b6f56877fd23b7ba3e5912b2f2a848f02
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many pointing to compromised WordPress installations and disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly support its malicious nature. No scripts were extracted, but the heuristic findings and URL analysis are sufficient to determine the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6843

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://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/vsrr5pjvht2c6kpaig8e2v58g5/3371542908.pdf In PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608006a15b5fe---20371114530.pdfIn PDF document text
    • http://saharun.org/uploads/ckfinder/userfiles/files/82650703728.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/0e66c82c69ed92b46203b3ea22e801a7/76356657054.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/a05323624859a7a4f97ec8b90228854d/guserupivamulobibotolaxe.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071722fc8022---69932617546.pdfIn PDF document text
    • https://girl0229960192.com/upload/users/files/37267905606.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/16090a0bc8f63e---67698704588.pdfIn PDF document text
    • http://jucal.es/images/file/fobuvixolikekibegidum.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608afbf6e7c74---31498248195.pdfIn PDF document text
    • https://wkd-uk.com/wp-content/plugins/super-forms/uploads/php/files/906c42c5a7185c4895ab85ff403d8fb1/gononejevurofexikitu.pdfIn PDF document text
    • http://appli-veolia.net/ckfinder/userfiles/files/xowogaxujawut.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1606e1333694f5---63433978803.pdfIn PDF document text
    • http://airsoft1.ro/files/file/wawazif.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/d2634bcf71093572702090bf87ab41ff/lirotenixezogepokax.pdfIn PDF document text
    • http://frutapac.com/ckfinder/userfiles/files/kevejosavizole.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16093b17643339---37588439159.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/44a1b8deaa5f95ae248f26ba523ed88f/kudanata.pdfIn PDF document text
    • http://broadgatecapital.com/userfiles/file/98973700148.pdfIn PDF document text
    • http://web-news.eu/www/pkpar/userfiles/file/17414308088.pdfIn PDF document text
    • http://tamlaproject.com/userData/board/file/tokopezif.pdfIn PDF document text
    • http://yalcinsezer.com/upload/ckfinder/files/51686135249.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=present+continuous+tense+exercises+pdf+eslPDF link annotation

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