Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5d851c61185ee9a…

MALICIOUS

PDF

87.2 KB Created: 2021-10-08 06:14:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-28
MD5: 59b05ecd1458904c3675e684f827fe64 SHA-1: 5508732e685eac7f93e434f7415281655a3f7d1c SHA-256: c5d851c61185ee9af99ea8166c1d2ddf9ab4b792641045293db31ea20497cc08
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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 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://inwebjor.ru/uplcv?utm_term=mantoux+test+positive+meaning PDF link annotation
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/027b5d8c138e4a4d08f24360332d8927/64120331807.pdfIn PDF document text
    • https://ashleymongolia.mn/uploads/files/44960433286.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/0552bf7bcc2c9bb15eede2510c0d9b24/74698879043.pdfIn PDF document text
    • http://ckrestaurantgroup.com/ckfinder/userfiles/files/vefiz.pdfIn PDF document text
    • http://espwireless.net/uploads/file/nalifu.pdfIn PDF document text
    • https://permargi.com/files/galeria/files/sijegamejexowor.pdfIn PDF document text
    • https://candbco.com/ckfinder/userfiles/files/32910611314.pdfIn PDF document text
    • https://gmnavarra.es/ckeditor/files/nififopeb.pdfIn PDF document text
    • http://ckm-machinery.com/userfiles/files/kavemawakavolunu.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/a0ad0fdf16fb4f8536a62869fc9f4f03/diwusiberatud.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1613eaafe6afc9---17805499763.pdfIn PDF document text
    • http://stoka-saarlouis.de/userfiles/file/67685951377.pdfIn PDF document text
    • https://youxsoft.com/uploads/files/rimizavuleribetuxudujax.pdfIn PDF document text
    • http://rakkhunnursinghome.com/user_img/files/71588203223.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/unfcsb89bfiacg7s3lrjb83ban/22196490658.pdfIn PDF document text
    • http://szm.hu/userfiles/file/vifijavuvapu.pdfIn PDF document text
    • http://btsoft.vn/uploads/files/51533020493.pdfIn PDF document text
    • https://mygrind.ie/userfiles/file/19506797226.pdfIn PDF document text
    • http://www.giuseppe.ru/ckfinder/userfiles/files/14106886601.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16143ba8bd7850---fuguxoruzodesapino.pdfIn PDF document text
    • http://lactopad.com/uploads/files/bukejalomemirog.pdfIn PDF document text
    • https://profession-your-dr.com/uploads/files/202110040729137304.pdfIn PDF document text
    • https://lapakunited.com/contents/files/38344741385.pdfIn PDF document text
    • https://remont-bez-zabot.ru/files/file/jafisunifuduxiketabes.pdfIn PDF document text
    • http://hytechplus.com/userfiles/file/48791289868.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED26 18740 bytes
SHA-256: 6250bc482b3e8e851b4cd5f6d02a9d635881548b07d18a734436551ed8b5a199
font_01_sfnt_off00011e23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E23 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001363a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1363A 10712 bytes
SHA-256: 9f865c01739abb6b0d7309840c609e51ece328b4561c6fabce948f1cfdf8e674