Malicious PDF — malware analysis report

Static analysis result for SHA-256 c074ac83b6254be9…

MALICIOUS

PDF

46.0 KB Created: 2021-06-24 23:21:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 1bc1d0f36ba649a4908070444f540e0e SHA-1: a8ae98e6e7a5e5e6cf4fa5024ac778b8e977c6e0 SHA-256: c074ac83b6254be96c8f53cefd06c8c2704bd90d2a010bb9d120540a10f6c76b
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 to external websites, many hosted on compromised WordPress sites, suggesting a phishing or malware distribution campaign. The document body, though heavily obfuscated, contains references to 'make pdf file look like scanned' and 'wkhtmltopdf', indicating a potential lure to disguise malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7159

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://crewmak.ru/uplcv?utm_term=make+pdf+file+look+like+scanned PDF link annotation
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/up4j3qhvgvl918gibmool8jooq/vujipitadijewibemajob.pdfIn PDF document text
    • http://icltindia.in/userfiles/file/vefununibiduwuwaresux.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072a1e0180d8---telot.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/9243b839c88d4710d8417d7659a3275a/bepisisog.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/3d91df2cd5c9bb4ae113045f8cbf1c69/zixadufiwireg.pdfIn PDF document text
    • http://tablica-nieruchomosci.pl/uploades/fckeditorfile/55883374525.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160859d4e6fdd6---85273823077.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4fdbf45dcc---sojisodak.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/kopiwejatuvewipixawomub.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/ede5f95ac6c39a0ec40f0015da34240c/jilakixanizifeve.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/16078976b7ec4c---basejapoxujin.pdfIn PDF document text
    • https://e-uchebnici.com/img/file/87571489469.pdfIn PDF document text
    • http://christopherspubandgrille.com/userfiles/files/64133822132.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086386e0a4ae---82559467213.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5b822c01e---53649432632.pdfIn PDF document text
    • https://artbynela.com/uploads/file/juxasajunowozimusaroz.pdfIn PDF document text

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