Malicious PDF — malware analysis report

Heuristics 8

• 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.
• Embedded JS stream low PDF_JS
  PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
• 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://crewmak.ru/uplcv?utm_term=how+to+put+widgets+on+home+screen PDF link annotation

  • http://studiotecnicoligioni.com/userfiles/files/nawarepol.pdfIn PDF document text
  • http://moscow-vernisage.com/files/files/99828805052.pdfIn PDF document text
  • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/161335f95a0232---2676806304.pdfIn PDF document text
  • http://yonezawanet.jp/units/24250/zcycom/files/40189589573.pdfIn PDF document text
  • https://kga-am-adlergestell-ev.de/kga/ckfinder/userfiles/files/46812386988.pdfIn PDF document text
  • http://sendedianqi.com/upload_fck/file/2021-9-4/20210904205858814474.pdfIn PDF document text
  • https://superiorservicesandsolutionsfl.com/nbloom/fckuploads/file/lagitijutekemoguwepo.pdfIn PDF document text
  • https://phatgiaolongan.com/upload/ckupload/files/42200743074.pdfIn PDF document text
  • http://skyrunarser.com/js/fckeditor/editor/filemanager/connectors/php/connector.php/upfiles/file/210902200331552474bejkrm.pdfIn PDF document text
  • http://asia-test.informacittadino.net/media/files/pidobafuferuvujezolosulax.pdfIn PDF document text
  • http://teakdeck.pl/files/file/99900422192.pdfIn PDF document text
  • https://detectiveoffice.net/userfiles/file/junugumuronibogujozoxos.pdfIn PDF document text
  • http://michelschuurmans.nl/images/uploads/file/senalalajunupisavalixun.pdfIn PDF document text
  • http://palirna-frydek.cz/uploaded/file/kisewa.pdfIn PDF document text
  • http://villapellegrino.it/userfiles/files/55894246543.pdfIn PDF document text
  • https://denimder.org/resimler/files/5481002039.pdfIn PDF document text
  • http://mynigaoe.com/upload/file/20210910192015.pdfIn PDF document text
  • http://thepnguyentran.com/media/ftp/file/75350396576.pdfIn PDF document text
  • http://www.skk.com.hk/admin/ckfinder/userfiles/files/fawawenarimusene.pdfIn PDF document text
  • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/29e77d377052886ca5da57f0a07954ad/88682081933.pdfIn PDF document text
  • https://www.afoa.org.ar/backend/ckfinder/userfiles/files/zejanowolozolatamubejapa.pdfIn PDF document text
  • http://windowsplusllc.com/ckfinder/userfiles/files/zoruzabe.pdfIn PDF document text
  • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/65f3eb3b3e66dc3e9d27285e24aaa2e6/45677365482.pdfIn PDF document text
  • https://ewdel.cz/ckfinder/userfiles/files/fupibomowejejizimu.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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