Malicious PDF — malware analysis report

Static analysis result for SHA-256 7270b20a4222043a…

MALICIOUS

PDF

62.6 KB Created: 2021-06-19 10:03:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 43a400b89c0601ab8fde0ce5f6fa940f SHA-1: 256f7ef2b1c64c6b902023c86b1e26619be0bac8 SHA-256: 7270b20a4222043aeeaaf3062d3df04cdbb706aab46e67cb1d5d970e0e9901b4
154 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with multiple URLs pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains metadata related to 'English grammar exercises pdf for beginners', likely a lure to entice users to click on the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9660

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 http://blissworldbeauty.com/newerac2c/userfiles/file/texizerizavuzubof.pdf
    • http://laptopplus.be/app/webroot/files/userfiles/files/25120117077.pdf
    • https://beautyyaurient.com/editor_upload/file/2892163562.pdf
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fbf746901d---42987838457.pdf
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160722e23deec7---10839057666.pdf
    • http://arohitourandtravels.com/userfiles/file/wosolajapigukimepize.pdf
    • http://przedszkolenisko.pl/userfiles/file/59408327344.pdf
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/88725810b4433382bb718f17d515f1cd/68812102003.pdf
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160ab2d7b14850---58814895363.pdf
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/coidbg58jbsiovb3cu9r8n3k7l/51685920988.pdf
    • http://fandimnarodaku.cz/upload/file/repafudefarudulelorebe.pdf
    • http://prinsart.ro/uploads/files/91910248010.pdf
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098ad44e0e56---52889692308.pdf
    • https://www.westcountrystoves.co.uk/wp-content/plugins/super-forms/uploads/php/files/4b14f7d9765547774330797543645618/85087637296.pdf
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/od60la65lvr7lm292fjfpes660/guxasesidilofigubimesunom.pdf
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/gsqrsap5i5nehe03q1sbolo8i3/19594726558.pdf
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e5366cdc52---vaduforuxuzedetadopidebut.pdf
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3c42b8280---36958365841.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=english+grammar+exercises+pdf+for+beginners

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