Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dc286ff11d5832f…

MALICIOUS

PDF

60.9 KB Created: 2021-07-29 23:57:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 1024159fe6a6dad6d484ccade4cbf42b SHA-1: 46d7317132d2bbfa88614c5d24ceecdd651197b7 SHA-256: 4dc286ff11d5832f993af706945cf7e832b26557d68ce0005041dfa3479f317c
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious. It contains embedded JavaScript and a large number of external URIs, many of which point to compromised WordPress upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection confirms its malicious nature, likely as a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9426

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 http://www.mostenpo.jp/userfiles/files/gogetarujirifefifa.pdf In PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099c2566b24a---fetiwadavojalisasitawo.pdfIn PDF document text
    • http://movietek.vn/hinh-anh/files/raganejixexofemujo.pdfIn PDF document text
    • http://kstarsmall.net/userfiles/file///99854919757.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/piropeluvete.pdfIn PDF document text
    • https://postelezmasivu-olomouc.cz/ckfinder/userfiles/files/354719322.pdfIn PDF document text
    • http://xn----8sbaqfskngn1qi.xn--p1ai/userfiles/file/zafemevodaveguvibidakilo.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a07aeaa5597---97833235843.pdfIn PDF document text
    • http://villapellegrino.it/userfiles/files/65405768431.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/160ac4b04bb1b7---gewibopemo.pdfIn PDF document text
    • http://grandrosso.com/js/upload/files/74626677398.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/16094d1e3b1d4a---31821623608.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084f0674c23a---49434760013.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16072b8d26c729---53679226410.pdfIn PDF document text
    • http://firmykominkowe.pl/Obrazki/edytor/file/73035789044.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/78170635372.pdfIn PDF document text
    • https://nergizleryapi.com/image/files/kesunijutopogosugirike.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/dlhsgc6uvqcti7oahrpget0593/99021018653.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609fe8b4a6088---73438848955.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a099cd7b9d8---11996879158.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/9go16ioi48sqk3s2rtnehvvvlu/80587260440.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/qmilk24g25qem8op13n7o742na/88765701803.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=pokemon+brick+bronze+uncopylocked+8th+gym+robloxPDF link annotation

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