Malicious PDF — malware analysis report

Static analysis result for SHA-256 feb63d784e9ee45e…

MALICIOUS

PDF

70.3 KB Created: 2021-07-20 12:26:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 86601163fd4fc9a2434704f6e2bd1625 SHA-1: d3d91560d51f9468e1179ca1d4e7d1c8bae83059 SHA-256: feb63d784e9ee45e84767adae5dd303593cc68de2f289765c9e5c612d83d25a8
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of links pointing to compromised WordPress sites, indicating a link farm designed to distribute malicious content or lead to phishing pages. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5526

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160df45e31f672---56195730199.pdf In PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b9497d6dfc2---petafowidoviru.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f323022c328---ziwinuwekixupuwobovusakon.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/22a8abf1e380cf55867e6b90f580c5ac/mavubawora.pdfIn PDF document text
    • https://grancom.by/upload/docs/16812457557.pdfIn PDF document text
    • http://absigorta.com/E/file/49375787667.pdfIn PDF document text
    • http://cukiernia-waltar.pl/qcms/userfiles/file/vozejeneviwome.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/16094dc9938d07---31389293776.pdfIn PDF document text
    • http://amandatour.ru/js/ckfinder/userfiles/files/33088441399.pdfIn PDF document text
    • https://sibservis.com/ckfinder/userfiles/files/55719208767.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160f43f2820f45---zasoborunuwagukiso.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/b7f6e72e24a4e2a376b19c440f00551e/99104129079.pdfIn PDF document text
    • http://sacoorhealth.pt/site/upload/file/mejewosoforiferovor.pdfIn PDF document text
    • http://aquatherm-graz.at/files/97821699855.pdfIn PDF document text
    • http://creativeindustries.ru/uploads/userfiles/file/kijetawex.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1e3387b477---53911937433.pdfIn PDF document text
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/7habavi38o3gkspr4bl9fl8a2n/bunikitobutir.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/3644a32aaedac13a29e6d7f2ea451b25/jogabevisefa.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/d272158f0aa9204546c53f77633fdb23/71379745162.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160919307e83fe---rejevinonufobegowamiduwi.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a5d3a4ed9bc---femujubebumox.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fbc8616f00---17240645501.pdfIn PDF document text
    • https://yukkumpulgroup1.com/contents//files/65583192092.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=issues+in+applied+linguisticsPDF link annotation

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