Malicious PDF — malware analysis report

Static analysis result for SHA-256 03a3f91ec616da50…

MALICIOUS

PDF

72.1 KB Created: 2021-07-05 14:55:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 63e9890dcf15173bfd4d6b16791dab8f SHA-1: 9da26975bdb07a690fcb7b4c69d258cd6ef50cdd SHA-256: 03a3f91ec616da5087c1aef7e56da4d783999f1db8b8a08d3fa405099e0f2f44
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is identified as malicious by ClamAV with a 'Pdf.Phishing.Trojan' signature. Static analysis reveals it functions as a link farm, with numerous URLs pointing to compromised WordPress sites. These sites host other PDF files, suggesting a chain of redirection likely intended to deliver a phishing page or a secondary payload.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4729

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://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/d022p00j8qfl0ivd6h52ge4ufu/giwabiwe.pdf In PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607c3864a3878---vumuteseziwuf.pdfIn PDF document text
    • http://bindashnews.com/userfiles/file/93417327257.pdfIn PDF document text
    • https://tucarrorentacar.co/ckfinder/userfiles/files/88653381513.pdfIn PDF document text
    • http://brilsports.ro/userfiles/file///6497619214.pdfIn PDF document text
    • http://mondoacquapiscine.com/userfiles/files/43134265459.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608ec4be8f21b---52079914543.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160c60bcc0a1b6---potejejipukazu.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/ea42a50c42eb30de47a95d202b671566/14065536467.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c628c8815d2---kirifiwovojuruvatufirepem.pdfIn PDF document text
    • http://sarljarry.fr/userfiles/file/11180044393.pdfIn PDF document text
    • https://planet-for-events.de/userfiles/file/88141205361.pdfIn PDF document text
    • http://cioccolatogallucci.it/userfiles/file/6097547738.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/g0flap09ur1tqe5bji948k6jb5/konatojemifesaporadajok.pdfIn PDF document text
    • http://photou.cc//ckfinder/userfiles/files/59836005817.pdfIn PDF document text
    • http://flirdining.com/uploads/files/zipuwa.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/hr4293ips4adnp7jq40g8t1h55/benojisorijafawasevoge.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b26aa21a1c0---kireruzugirabimax.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0e7e4caa2a---33322537720.pdfIn PDF document text
    • http://tydafa.com/dafa/uploadfiles/20210607202804.pdfIn PDF document text
    • https://aterhesseg.com/up_image/file/3336891340.pdfIn PDF document text
    • http://kaowei.tw/image/files/20210529_125014.pdfIn PDF document text
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/3fec5ff2b56176f699a09616c7676daa/39202865407.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=types+of+nicePDF link annotation

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