Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf6d29b31272e3a2…

MALICIOUS

PDF

70.5 KB Created: 2021-07-08 22:41:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 8f2ccdeb5037b6ca1ec4c3644459c42d SHA-1: 0f61a529d528b29a85faca145b171b7a244bcde8 SHA-256: bf6d29b31272e3a21b6281ccd558cb80db576cbc969efdb2448e684a834cf7a5
124 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to compromised WordPress upload directories. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a malicious intent, likely to lure users to phishing sites or potentially download further malware. The file's structure as a link farm on disposable hosting further supports a malicious purpose.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4988

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://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1608dcb7035e51---69613611612.pdf In PDF document text
    • http://xnkvinatimex.com/uploads/files/luvorareguzisuwudidelomes.pdfIn PDF document text
    • https://netiko.ge/img/Data/file/fogomudabuxumowiboli.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16097dc395c4dc---7402251201.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/lmpiaukaiafgeno6m2ks7klq2j/kamado.pdfIn PDF document text
    • http://agendatourvietnam.com/hinhanh/file/23321752320.pdfIn PDF document text
    • http://accronline.com/userfiles/file/68888781662.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/7e5c6079094ae56503ca01d82d788329/saxusotowipenozixuvo.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1609832f5e34ef---sibulafazarepiwepaveziloz.pdfIn PDF document text
    • http://g-shocktou.com/user_file/file/luxipivopokelugi.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608a846a45276---xedoloxetevobozum.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/157311d45c07205116fdc893d8f2fb1f/runibebesobilexoli.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/k31prsbdl85o69s6j7n9dchpbc/23320902649.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/huv98j0ps3lnu7quaq2no93ql1/85035080336.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/542559d8d8e7a812ddb963016effe718/topagamitow.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/33fcc046e995c023d1dd4dfd648a48aa/xedonazigavemujuj.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c208f00671e---robixenorik.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3dcf57916---70464499051.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/9455ba90ef89cae70615875362bfcdc4/pulusuxojot.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/pedutadenalafo.pdfIn PDF document text
    • http://sparkpro.lv/content/file/rekejemiwitup.pdfIn PDF document text
    • http://studiogalata.it/userfiles/files/fozon.pdfIn PDF document text
    • https://realxenon.ru/uploads/files/zadagimone.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=15+questions+about+mePDF link annotation

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