Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa84f76c14c583c1…

MALICIOUS

PDF

72.8 KB Created: 2021-06-09 13:01:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-07
MD5: bacf0d910d4b94b43cbd390ecda0e67b SHA-1: 0a57167315f246a54163ee0ee7aa68c2e4039190 SHA-256: aa84f76c14c583c13777b1b3c0b4975868efd8fa75ff4377b00a7f87262d4461
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://philabc.ru/uplcv?utm_term=saxon+calculus+with+trigonometry+and+analytic+geometry+pdf PDF link annotation
    • http://modnyi-buket.ru/uploads/files/39075230637.pdfIn PDF document text
    • http://cheers-gifts.com/userfiles/2593640195.pdfIn PDF document text
    • https://codecs.ro/images/file/98486713270.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160abcd7e5ffbd---67761558328.pdfIn PDF document text
    • http://gld-lining.com/user_img/files/bopizuvonujutegivexo.pdfIn PDF document text
    • https://bikidi.com/UpFiles/WebEditorFiles/file/87282510389.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/td4nofhevd7kjdp0a4cd3e208t/36262092209.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d5f9056a2---wexanivipulapek.pdfIn PDF document text
    • https://flyags.com/editorResources/file/%5C/91292595789.pdfIn PDF document text
    • http://www.thaiboat.net/image/upload/File/18109230347.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16098be27715d8---ketalaf.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/to9eg157pnrosed96in6n9o7e8/ramekamobenesumujegunoz.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160bfda77adede---344380854.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/0d840a1b2d77c2d335251cb9bfe590da/9072584102.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD49 5816 bytes
SHA-256: 174f08c54f70adf89d1748ec7b731829b757ab0159cd1f8efcdc41621fd24602
font_01_sfnt_off0000e0fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0FB 11488 bytes
SHA-256: be4a8c88c22cee955da1d82aad0f6ce8b68b6673fbe3640605862ec016fb4d9d
font_02_sfnt_off0001076d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1076D 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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