Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ba5ca73ec5951bf…

MALICIOUS

PDF

54.8 KB Created: 2021-09-19 18:37:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5f674a4a4d6e11a74cea15b948163bc4 SHA-1: 56b1457d7c9d30a315ee5b97791774323047ec31 SHA-256: 8ba5ca73ec5951bf95de739dcf858fe5d5837ba3750e4ea738495402848e2b52
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 0.6108

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