Malicious PDF — malware analysis report

Static analysis result for SHA-256 63440a3b8cd9b909…

MALICIOUS

PDF

74.4 KB Created: 2022-04-03 06:47:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-04-28
MD5: f42369e564b51060fc469ec2a961c0e6 SHA-1: 7339cb11b8660bfd69fdbc19113d0085c4d4d532 SHA-256: 63440a3b8cd9b909ff9b7c46a2d3f76c6cf58819d75a6d1f2b18291482548850
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://rubenoferro.com/userfiles/file/8852116303.pdf In PDF document text
    • https://winalefumigis.weebly.com/uploads/1/3/1/4/131437210/ludapagajebuji_kulavetipolus.pdfIn PDF document text
    • https://sinditamaraty.org.br/site/public/ckeditor/kcfinder/upload/files/fopofulewuromovomogexibe.pdfIn PDF document text
    • https://hklh.vip/data/attachment/file/50345277692.pdfIn PDF document text
    • https://defupodanujazi.weebly.com/uploads/1/3/5/3/135346118/5240652.pdfIn PDF document text
    • https://bojemoravegoda.weebly.com/uploads/1/3/6/0/136095552/kepudorarototaw-taxisor.pdfIn PDF document text
    • https://mewuvonemifutu.weebly.com/uploads/1/3/5/3/135394867/lenonofemap.pdfIn PDF document text
    • http://geshome.co.jp/cmsdesigner/kcfinder/upload/files/vopepepilarerex.pdfIn PDF document text
    • https://kumakisatosoref.weebly.com/uploads/1/3/5/3/135328720/8531826.pdfIn PDF document text
    • https://lipijunozawisek.weebly.com/uploads/1/3/4/7/134721324/jonirifuxufo-zisisalobede.pdfIn PDF document text
    • https://wisakonison.weebly.com/uploads/1/3/4/7/134766038/f57ba.pdfIn PDF document text
    • https://vozutadisifik.weebly.com/uploads/1/3/1/4/131483249/tagizotami.pdfIn PDF document text
    • https://sigajijatikad.weebly.com/uploads/1/3/1/3/131379485/819364.pdfIn PDF document text
    • https://bemozepe.weebly.com/uploads/1/3/0/7/130739793/basijot.pdfIn PDF document text
    • https://nhaccugiare24h.nhaccutienminh.com/uploads/userfiles/file/pipukinuwedejavur.pdfIn PDF document text
    • http://bedrucken24.de/userfiles/file/24493945243.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/16244a68cb8ab2---sesezinunuvamozapada.pdfIn PDF document text
    • https://fadoxidibeja.weebly.com/uploads/1/3/2/6/132695582/7062288.pdfIn PDF document text
    • https://tevav.co.za/YmrXLWy8?keyword=engineering%20economic%20analysis%2012th%20edition.%20PDF 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 extracted file (font_00_sfnt_off0000b9a6.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0000b9a6.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b9a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9A6 17896 bytes
SHA-256: b43a82bee75f5158d932f9fd6bddeb488ec314323f57cda4ad5fc5fdec72912f
font_01_sfnt_off0000e83e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE83E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010055.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10055 11440 bytes
SHA-256: 85e561a06b5534aa84ae6770e4000074df69a7cc0d33088d8c4767cd08ed482a