Malicious PDF — malware analysis report

Static analysis result for SHA-256 a58e3a9631531d64…

MALICIOUS

PDF

64.0 KB Created: 2021-07-22 10:41:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 8f5d9f417c264b98b84f0f917b17607e SHA-1: 61ced7cf90a479bbad72918fc750529cf1c7865c SHA-256: a58e3a9631531d6477014e8f2def591a4b00c46cdbe0afc22bb7414ca34fa7d3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains numerous links pointing to compromised CMS upload storage and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics strongly suggest this document is part of a phishing campaign, likely using spearphishing attachments to deliver further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6844

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://taeguektour.com/FileData/ckfinder/files/20210602_868DD644C80DFE49.pdf In PDF document text
    • http://talleresjpg.es/img/file/7175237924.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/270b5d55729815a41e102f25518ab68b/tizaxozone.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609876101e7f8---diburajabomapox.pdfIn PDF document text
    • http://nousgarage.com/userfiles/file/murovufamiwajepe.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/9d49bbf6b8eae3dbd824a0dba2dd9eae/lanaselubonuv.pdfIn PDF document text
    • http://bungefamily.com/clients/5233/File/valubenibujote.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/a68e7f86129644399f6503ed7ead9636/43833513381.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec560111f1---mapetoku.pdfIn PDF document text
    • http://shavers-boles.com/clients/7/73/73b1ad2e2c85410b7b015c0c79a6caf4/File/11691928353.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae05e178d4a---98498373610.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/gs36aullpmkgkobucquutc8mgj/11789291957.pdfIn PDF document text
    • https://kurek-rowery.pl/user_pict/file/33279846227.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab75c05041d---53704570637.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c4d7ac17e89---fejuduguvupivokogasiwifa.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/l8ustrernchtkkl29pegops127/sukamukepagevawisirorip.pdfIn PDF document text
    • http://uhy-th.com/image/upload/files/lebimuj.pdfIn PDF document text
    • https://burstallconrad.com/editor_files/file/laruruxojob.pdfIn PDF document text
    • https://floridainvestment.cz/files/file/wiriparurar.pdfIn PDF document text
    • https://sheenabusesandcoaches.com/userfiles/file/43469850781.pdfIn PDF document text
    • http://www.cerathai.com/image/upload/File/funabimokepaluxapaxud.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/0fcda130f2cbbec92cf9010237fca7f5/77887314885.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=difference+between+lathe+and+milling+machine+pdfPDF link annotation

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