Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dd8c764a8141e46…

MALICIOUS

PDF

81.7 KB Created: 2021-10-18 22:00:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-26
MD5: 4acc151dc6bb81778b3af15bc677e64d SHA-1: 4754fd8127218dfcc938b8054e06b24945964ac2 SHA-256: 3dd8c764a8141e46499ae0aefecf4b70bdbc3cbd328c84e8e8808d6d738f0360
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9938

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://pistant.ru/uplcv?utm_term=libros+del+cuerpo+humano+para+ni%C3%B1os+pdf PDF link annotation
    • http://marymo.ru/uploads/files/lodivupalapomixirex.pdfIn PDF document text
    • http://drtamerturan.com/file/xisoletafetumuzuburux.pdfIn PDF document text
    • http://ministryofrum.com/memlogos/file/vabobosexelovanuxamote.pdfIn PDF document text
    • http://affordableadobe.com/ckfinder/userfiles/files/67900788620.pdfIn PDF document text
    • http://woykoff.hu/upload/file/432458017.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16166f46e347a9---xazexejoluxe.pdfIn PDF document text
    • https://euro-m.si/web/dokumenti/file/99383034725.pdfIn PDF document text
    • http://automotiveenergy.cz/userfiles/file/85210296651.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/8ce63eeaa20b92b2afa5aed93c82f92e/3567144557.pdfIn PDF document text
    • https://zdravka.hlpr.hr/userfiles/file/84448421567.pdfIn PDF document text
    • http://worshipedia.mobi/sites/default/files/file/susobobelobum.pdfIn PDF document text
    • http://janaturismointegrato.com/uploads/file/85142248685.pdfIn PDF document text
    • http://haciogullari.com/depo/sayfaresim/file/wakenetotopomofemadex.pdfIn PDF document text
    • http://rajskiewakacje.pl/userfiles/file/37506391811.pdfIn PDF document text
    • http://www.anglometais.com.br/adm/Editor/ckfinder/userfiles/files/kokodalizatafewojuzu.pdfIn PDF document text
    • http://www.weilandensemble.nl/ckfinder/userfiles/files/marodexuzanud.pdfIn PDF document text
    • https://infotechloyalty.com/bot/ckfinder/uf/files/38228604895.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/6498c6da9781540e81c436ce3564ee81/86412095782.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1615b94e5118b5---madebobudodida.pdfIn PDF document text
    • http://ptk-tent.ru/userfiles/file/mifopamedevir.pdfIn PDF document text
    • https://redfortfireworks.com/ckfinder/userfiles/files/83656617209.pdfIn PDF document text
    • http://abwmountvernon.com/uploads/files/nivewapapedaliwozubarowa.pdfIn PDF document text
    • http://bunny888.com/ckfinder/userfiles/files/xumoroxiti.pdfIn PDF document text
    • http://www.culturehousesun.org/photos/file/80646628964.pdfIn PDF document text
    • http://locum-system.pl/userfiles/file/liwukowufimiru.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c1bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1BF 17948 bytes
SHA-256: 57dc2bf28a202b21a081d34a8fcb4ce6eb81e88a02c33594b88107fd651d3cce
font_01_sfnt_off0000ef6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF6F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010786.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10786 11192 bytes
SHA-256: 6ff4e40f72e9c02e484299b934697dd2e81c2c4a608b653fb6bf0d8367bd97dd
font_03_sfnt_off000120fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120FD 16064 bytes
SHA-256: f76835efc0f70b52b211676925d3c3919e6952eec6cd10f320d1ab287c5fabf2