Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e37bc3a458906df…

MALICIOUS

PDF

85.2 KB Created: 2021-08-26 14:58:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-19
MD5: 4e138782ba6c4626050c514267251c7b SHA-1: 7c283046897958ccb4e229c667097633777e48dd SHA-256: 4e37bc3a458906df0afe9c20c950c3c1f15bd4119b2d50549ad9207ea5c442f7
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/a97476541d0641decb94d65ddc8682f0/fawitugapavonuxedove.pdf In PDF document text
    • http://strategie-online.net/catalogue_dynamique/file/kimokazidu.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/iqeaqh06cim35j107k47g13hdl/mikidiwaxoratasawegapaz.pdfIn PDF document text
    • http://2020kellyfamilyreunion.com/clients/1/1c/1c0e63424c3b5e20a3d858f77c59864f/File/fumojazatevasikufosezif.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/evscvi07uu50fok0mcfg54rd29/zudixazaguruwil.pdfIn PDF document text
    • http://acutecardio.ru/sadm_files/98083286131.pdfIn PDF document text
    • http://skyline1968.com/clients/74864/File/82237267962.pdfIn PDF document text
    • http://fashioneducation.ru/userfiles/file/vipogutologav.pdfIn PDF document text
    • https://mediaget.ru/userfiles/files/74840402211.pdfIn PDF document text
    • http://blfimmobiliare.com/userfiles/files/67234696008.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210517164828132.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ecd7e68370---26099094286.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b028bb1a15---wabedeponugezovesidilamaj.pdfIn PDF document text
    • http://innova-perila.ru/upload/files/gorudekego.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/ba99hng6uv09t2q308mn38jkn7/bivaxaxitofezuva.pdfIn PDF document text
    • https://projektovanje.info/userfiles/file/66769100585.pdfIn PDF document text
    • http://abwcrainhwy.com/uploads/files/dukifavol.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b4d5ebdfe69---67833478203.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16107dc94ba9af---dinijapakabep.pdfIn PDF document text
    • http://hanmih.com/userfiles/file/20210725231107.pdfIn PDF document text
    • http://gemculture.com/userfiles/file/51495232229.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=guppies+with+tetrasPDF link annotation
    • 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_off0000ee62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE62 10304 bytes
SHA-256: 94162eba97f1364d22de50d1a1539d731477f3dd5f4d300327c6e6e0a397a90c
font_01_sfnt_off000105db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105DB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ded.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DED 16200 bytes
SHA-256: b6b30509181b4ce0db8d2493b0944f94026bb08faec4c5e155e47d498121c546