Malicious PDF — malware analysis report

Heuristics 7

• 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
  PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
• 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
• Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
  The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
• 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://hung168.tw/UserFiles/files/96555550657.pdf In PDF document text

  • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/161368f29ebe14---bimowutabofema.pdfIn PDF document text
  • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/b9ee0fe866e20caa6d82992748f20b04/zonuxi.pdfIn PDF document text
  • http://sibleyestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vibufovepo.pdfIn PDF document text
  • http://xn--22cjbbm2eyae3ehabdb4kqdtae3dxnnc1fhf.com/user_img/files/parobepudedidavubufewax.pdfIn PDF document text
  • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/2bd3f428d65fa955cd6be9fbc04e2e24/110340222.pdfIn PDF document text
  • https://postelezmasivu-ostrava.cz/ckfinder/userfiles/files/17868963169.pdfIn PDF document text
  • http://viprealestatebrokers.com/userfiles/files/dolufobixubarexelo.pdfIn PDF document text
  • http://havefuntogether.com/image/upload/File/32967420800.pdfIn PDF document text
  • http://gradn.ru/uploades/fckeditorfile/ramej.pdfIn PDF document text
  • https://internationallanguagenavigators.com/media/23569749477.pdfIn PDF document text
  • https://bharatiyabhashaparishad.org/ckfinder/userfiles/files/pitisapesusexozanedijibug.pdfIn PDF document text
  • http://sevvalturizm.com/rsm/files/73317715242.pdfIn PDF document text
  • http://ksnjl.com/userfiles/files/rajanunomosadizanariwid.pdfIn PDF document text
  • https://vwb.mrv-educationservices.com/content_file/files/65212666834.pdfIn PDF document text
  • http://sparan-art.ru/ckfinder/userfiles/files/1240212626.pdfIn PDF document text
  • http://baracenter.be/userfiles/file/1146923735.pdfIn PDF document text
  • http://fc-junajted.com/upload/datoteke/3211854281.pdfIn PDF document text
  • http://starma.pl/files/file/jalexaxarisiludozixefupor.pdfIn PDF document text
  • http://snap-drone.com/userfiles/file/81781598899.pdfIn PDF document text
  • http://galettedesrois.eu/userfiles/file/24521120449.pdfIn PDF document text
  • https://kligi.viart.lt/ckfinder/userfiles/files/goziwit.pdfIn PDF document text
  • http://csc0351.com/userfiles/file/20210918045701_kugl6n.pdfIn PDF document text
  • http://skalamatbaa.com/userfiles/file/60203014234.pdfIn PDF document text
  • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=app+galaxy+buds+para+pcPDF link annotation
  • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
  • http://purl.org/dc/elements/1.1/In PDF document text
  • http://ns.adobe.com/pdf/1.3/In PDF document text
  • http://ns.adobe.com/xap/1.0/In PDF document text
  • http://ns.adobe.com/xap/1.0/mm/In PDF document text
  • http://ns.adobe.com/xap/1.0/rights/In PDF document text
  • http://dejavu.sourceforge.netIn PDF document text
  • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

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