Malicious PDF — malware analysis report

Static analysis result for SHA-256 22420ef94348e005…

MALICIOUS

PDF

57.5 KB Created: 2021-09-19 18:37:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 4c7c5e7ba96e1513ec1d4bc278828328 SHA-1: a3b88c59f33b440df41aa95448ae800d8f259979 SHA-256: 22420ef94348e005d2aa61dd6a6229711d43c7915aceee375271000695277ab0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, and exhibits characteristics of a link farm. Multiple heuristics indicate the PDF contains numerous links pointing to potentially compromised or disposable hosting, suggesting an attempt to obscure the final malicious destination. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7666

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://kapelski.pl/userfiles/file/gilimisitebofepelipanorap.pdf In PDF document text
    • http://makesrealsense.com/ckfinder/userfiles/files/litixaw.pdfIn PDF document text
    • http://pepinieres-soupe.com/userfiles/file/17807205607.pdfIn PDF document text
    • https://paradigma.bg/uf/file/nufatelekotamep.pdfIn PDF document text
    • https://partnyor.az/userfiles/file/bizawekoxepoberasesegoxid.pdfIn PDF document text
    • http://dasbluemchen.com/boposixedaxiwow.pdfIn PDF document text
    • https://bywuf.org/upload/editor/files/98105371152.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/d27d27c6803eaef7369cd70987230392/59568773143.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132ccaee8d9a---49423481207.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143e9a015b36---mizosajusokeburivor.pdfIn PDF document text
    • http://ozdesignhouse.com/app/webroot/uploads/files/xiferi.pdfIn PDF document text
    • http://landpas.pl/upload/file/35712135910.pdfIn PDF document text
    • http://johndanton.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/3308309403.pdfIn PDF document text
    • http://www.synagoge-stommeln.de/ckfinder/userfiles/files/55222040289.pdfIn PDF document text
    • http://gysanya.com/upload/file/210912181035096396lzddnujhzlvc.pdfIn PDF document text
    • http://zhxndl.com/uploadfiles/files/kiniv.pdfIn PDF document text
    • http://cuuhoatudong.com/upload/files/dunilez.pdfIn PDF document text
    • https://angkaindaman.com/contents/files/xugubevetud.pdfIn PDF document text
    • http://vpsystem.com/files/fck/1474168615.pdfIn PDF document text
    • http://djpress.pl/Image/files/xojonulexoriberobufag.pdfIn PDF document text
    • http://ambiance-cinema.fr/wp-content/plugins/super-forms/uploads/php/files/f69801680960d4554e963dd1a0185e9b/63815161162.pdfIn PDF document text
    • http://saluteebenesseresas.it/userfiles/files/41491306523.pdfIn PDF document text
    • https://onecre.com/images/content/files/54427336088.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161473696dc57a---6946829165.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=stuck+in+twrp+recovery+modePDF link annotation