Malicious PDF — malware analysis report

Heuristics 6

• 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://pistant.ru/uplcv?utm_term=three+letter+words+with+u+in+the+middle PDF link annotation

  • http://harryreichert.de/uploaded_pics/News/file/lawibuk.pdfIn PDF document text
  • https://mintowncoffee.net/uploads/images/files/kubugimetufano.pdfIn PDF document text
  • http://saydersan.com/firma/files/10387344844.pdfIn PDF document text
  • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ce36f6dd83---xananobagotes.pdfIn PDF document text
  • https://local-atlas.ru/userfiles/files/xogexenutite.pdfIn PDF document text
  • http://www.sport-konyv.hu/userfiles/file/binajumekapanim.pdfIn PDF document text
  • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/rpi9i5q3frja3j60c72jql0574/57309196232.pdfIn PDF document text
  • https://eol.org.pe/ckfinder/userfiles/files/18906546172.pdfIn PDF document text
  • https://vientangluc.com/upload/files/56741096819.pdfIn PDF document text
  • https://ukmriptek.org/codeIgniter-hmvc/userfiles/files/lujiwadatagetuwe.pdfIn PDF document text
  • https://beautydent.hu/editor_up/tivemilexinerun.pdfIn PDF document text
  • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/1609dd6afc46d9---jepurefiwesamevipibu.pdfIn PDF document text
  • https://avela.md/userfiles/file/89046011305.pdfIn PDF document text
  • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/160bb4c6cb61b9---62100419583.pdfIn PDF document text
  • http://sns-russia.ru/userfiles/file/27396739428.pdfIn PDF document text
  • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610a37ac365ef---bulijo.pdfIn PDF document text
  • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160b081132fb79---bipexogafejule.pdfIn PDF document text
  • http://alexlunacoach.com/img/editor/file/22283512132.pdfIn PDF document text
  • https://hotelexpert.ro/uploads/files/40585112064.pdfIn PDF document text
  • http://mkbeauty.vn/luutru/files/gajigujunelinalasodowoju.pdfIn PDF document text
  • http://csc0311.com/userfiles/file/20210807101239_4j6lku.pdfIn PDF document text
  • https://secolink.sk/userfiles/file/mazepavopuwilala.pdfIn PDF document text
  • http://oaklandscreche.ie/userfiles/files/65044130496.pdfIn PDF document text
  • http://chaodontuonglai.vn/uploads/ck_upload/files/nuxamitijajipag.pdfIn PDF document text
  • https://responsible-tourism-alliance.com/content_file/files/jovofakobu.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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