Malicious PDF — malware analysis report

Static analysis result for SHA-256 991e799818a4352b…

MALICIOUS

PDF

44.3 KB Created: 2021-08-16 07:17:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 8ac2b59b01942b0be4c72ce2a0cb06d8 SHA-1: 72d0381c9785edd6fb91421452b63cc671c67dda SHA-256: 991e799818a4352b1f0a8b4edca63b25e2105a8dfab64d2051e6a808033ba2a2
154 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 websites or disposable domains, indicating a link farm designed to lure users to potentially malicious content. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7407

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://catamma.ru/uplcv?utm_term=womens+fila+disruptor+2+premium+athletic+shoe+-+white PDF link annotation
    • https://lotteppta.net/beta/assets/file/kafidubatofepuzelafixala.pdfIn PDF document text
    • https://leavingcare3plus.ch/userfiles/files/63070511719.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608c7cd2c1f9f---47081540659.pdfIn PDF document text
    • http://mashhadgardi724.ir/basefile/mashhadgardi724/files/raxopofokesilinezawo.pdfIn PDF document text
    • http://prosquash.by/data/rupijaxepujamavokuduwowe.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0401a01a2e---pepebesujekudugidigufipu.pdfIn PDF document text
    • http://cuatudongnhatrang.com/uploads/files/55839676511.pdfIn PDF document text
    • http://broadgatecapital.com/userfiles/file/kefax.pdfIn PDF document text
    • http://aprendanow.com/wp-content/plugins/super-forms/uploads/php/files/d88a6023c972c1b90a21d3484ba3c766/gadus.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606fdda49ff71---41266177206.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608eb86f3594a---miwekefizumekudurow.pdfIn PDF document text
    • http://hysansam.com/fckeditor/userfiles/image/dajekixalabipamo.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160de7720aca42---wewuvawez.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/a3b76f00024f5d910764ffa0c90f1080/nelulevezovepo.pdfIn PDF document text
    • http://vestmorecapital.com/images/epost/wutobudalinubunet.pdfIn PDF document text
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/bfda464baf16b8cad0002551300bea1c/41637500245.pdfIn PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16070cbc23f0ff---xaxuvevepivur.pdfIn PDF document text
    • http://poorclarescork.ie/images/labozuras.pdfIn PDF document text
    • http://hasyo.net/files/file/94751474182.pdfIn PDF document text
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/mk0mienldehmcepuib7leatqli/neziforanezulaxivetijuv.pdfIn PDF document text
    • http://fine-cottage.ru/userfiles/files/famulapazolijeboserirus.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/36e6704c9372427b67a4c9bd1d9ee034/30820749703.pdfIn PDF document text
    • https://mepho.hu/ckfinder/userfiles/files/muvetubexunewosobuda.pdfIn PDF document text

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