Malicious PDF — malware analysis report

Heuristics 8

• ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
  ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
• 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.
• Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
  Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
• 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://crysiq.ru/uplcv?utm_term=rsmssb+ldc+paper+12+aug+2018+pdf PDF link annotation

  • http://nfc.soo.jp/file/fikepidopuxuwuxolufibod.pdfIn PDF document text
  • https://estudiowebcolombia.com/ckfinder/userfiles/files/wojifeni.pdfIn PDF document text
  • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/dqvo3f7r71a8ptq220dj66d0r7/90502862493.pdfIn PDF document text
  • http://www.accl-calibration.com/login/ckfinder/userfiles/files/junufifebetelebu.pdfIn PDF document text
  • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5d16314256---witer.pdfIn PDF document text
  • http://vom-ragnaroek.de/uploads/file/73488418221.pdfIn PDF document text
  • http://cauthinh.com/luutru/files/87277293691.pdfIn PDF document text
  • http://angeladaniel.de/uploads/files/22268903428.pdfIn PDF document text
  • http://veterinarioassociatopacinidallatorre.eu/userfiles/files/fuvakaluk.pdfIn PDF document text
  • https://atcotourismtravel.com/userfiles/file/4885684072.pdfIn PDF document text
  • http://zit-tech.com/userfiles/files/14043501036.pdfIn PDF document text
  • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081025247a43---41543237410.pdfIn PDF document text
  • https://giriconsultancy.com/content_files/files/gikawafufo.pdfIn PDF document text
  • http://madiran-cruduparadis.fr/ckfinder/userfiles/files/70230072391.pdfIn PDF document text
  • http://monkey-do.net/userfiles/file/43269304802.pdfIn PDF document text
  • http://jungvassar.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/20924395967.pdfIn PDF document text
  • http://agriturismolataggiasca.eu/userfiles/files/29379107211.pdfIn PDF document text
  • http://hopkim.vn/upload/files/59670472602.pdfIn PDF document text
  • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1611d103a4687d---57747694467.pdfIn PDF document text
  • http://recviem.ru/img/upload/6041903857.pdfIn PDF document text
  • http://perfekt-dom.pl/designhome/admin/userfiles/file/numekab.pdfIn PDF document text
  • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/e4b911c9d999f73eb709af791ffcd2ee/39643099518.pdfIn PDF document text
  • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/a8bb53eaa51f9641158677468f039b00/wibepuneduxa.pdfIn PDF document text
  • 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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