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
• PHP webshell / backdoor source critical WEBSHELL_PHP
  The file contains PHP server-side code with the signature of a webshell/backdoor (named PHP webshell banner (madspot)). A webshell takes attacker input from an HTTP request and runs commands/code on the server. Flagged as a malicious hacktool artifact even when carried inside a document or archive — the code does not execute from the carrier, but the file is a webshell.
• PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
  PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than 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.
• 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://infrive.ru/uplcv?utm_term=mp4+movies+marathi In PDF document text

  • https://gilbertems.com/videos/file/96354089336.pdfIn PDF document text
  • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137192d6051b---89134693098.pdfIn PDF document text
  • http://cosmosimpex.com/app/webroot/ckfinder/userfiles/files/56771997031.pdfIn PDF document text
  • http://abwmechanicsville.com/uploads/files/25873663879.pdfIn PDF document text
  • https://pinpointfeedtech.com/ckfinder/userfiles/files/59706821339.pdfIn PDF document text
  • https://tahuacoop.com/cms_gpadmin2015/sgi_userfiles/userfiles/files/xadit.pdfIn PDF document text
  • https://madspot.dk/ckfinder/userfiles/files/10209230610.pdfIn PDF document text
  • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147b825d2045.pdfIn PDF document text
  • https://y3stwk65l-mn9.com/contents/files/molenojuw.pdfIn PDF document text
  • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140eb2c0e4e1---lokibirojijewapave.pdfIn PDF document text
  • https://buka.ru/sadm_files/molisotagarumob.pdfIn PDF document text
  • http://sahcarpets.com/userfiles/file/ruwakenijozukepazi.pdfIn PDF document text
  • https://defi128.phpascal.com/userfiles/files/83872510999.pdfIn PDF document text
  • https://dongphuchuytai.com/upload/files/wijerirurafovuxowaz.pdfIn PDF document text
  • http://ingore.cn/upload/files/sigukinaladutiwigifugos.pdfIn PDF document text
  • http://restavratorstvo.com/ckfinder/userfiles/files/rojubexapozenisufaxok.pdfIn PDF document text
  • http://barcelonasixtytwo.com/userfiles/file/dipumutefeduwigewivi.pdfIn PDF document text
  • http://rubella2.integra-sh.com/userfiles/file/21415771638.pdfIn PDF document text
  • http://namkhoabacninh.com/images/files/roxasazarogebovuxaxomef.pdfIn PDF document text
  • http://tomei4x4.jp/js/upload/files/wivamuzo.pdfIn PDF document text
  • http://letresorellebio.it/userfiles/files/15087699474.pdfIn PDF document text
  • http://barcabianca.eu/upload/file/31831535631.pdfIn PDF document text
  • http://zhengfutz.com/v15/Upload/file/20219221935341340.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 extracted file (font_00_sfnt_off0000b7d3.bin)
  • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0000b7d3.bin)

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