Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa8b57bdf70c0107…

MALICIOUS

PDF

90.1 KB Created: 2022-05-04 04:03:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-06
MD5: ba9076551f6b0ab26e7e951b386c8acd SHA-1: 3089ecd447948ab7a94ba155eb2d30917f15a9fd SHA-256: aa8b57bdf70c0107193005c173814b387b95a618e541b63ae4437451c10c3615
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://mifuj.co.za/YmrXLWy8?keyword=validity%20and%20reliability%20in%20assessment%20pdf%20%20windows PDF link annotation
    • http://tw-jia.com/uploads/files/202204212100375420.pdfIn PDF document text
    • http://thucphamchucnangmy.vn/uploads/files/zokodubifa.pdfIn PDF document text
    • http://gira-classix.su/kcfinder/upload/files/85920304654.pdfIn PDF document text
    • http://bhavalaya.org/ckfinder/userfiles/files/83237742548.pdfIn PDF document text
    • http://gccde.com/downloads/blog/geust/files/88477828688.pdfIn PDF document text
    • https://bluedomain.online/ckeditor/kcfinder/upload/files/kewemuzukuxewuxokisa.pdfIn PDF document text
    • http://kvbm.org/pds/userfiles/files/dowijibanadewapemudowefus.pdfIn PDF document text
    • https://berigagagek.weebly.com/uploads/1/3/1/3/131384675/6803577.pdfIn PDF document text
    • http://australiandc.eu/uploads/ckeditor/files/32173371216.pdfIn PDF document text
    • http://ukonlinedirect.com/userfiles/files/32120883664.pdfIn PDF document text
    • http://jinruily.com/UploadFile/file/20220428043035601.pdfIn PDF document text
    • http://turnkeyparts.com/site-uploads/dujoriroxuvuxafigagarul.pdfIn PDF document text
    • http://twinmd.ru/userfiles/file/rifibo.pdfIn PDF document text
    • http://tinhdauvietnam.vn/upload/files/laligewefegetan.pdfIn PDF document text
    • http://htbestcomputer.com/media/ftp/file/mezexabotedumexulenik.pdfIn PDF document text
    • http://kuryakyn.ru/userfiles/file/20221142070.pdfIn PDF document text
    • https://megigoxifiwovom.weebly.com/uploads/1/3/0/7/130740625/8ad7b2c4b770.pdfIn PDF document text
    • https://kajugolake.weebly.com/uploads/1/3/0/9/130969904/9686688.pdfIn PDF document text
    • http://apexemergencias.com/images/files/mexorafafidimebebapugekuk.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
    • https://doi.org/10.1016/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_off0000fb47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB47 16744 bytes
SHA-256: 7335a9187abafa87997fd18def892f8e69f662f808431a2cf96b1bd461ca6ebb
font_01_sfnt_off0001269d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1269D 10968 bytes
SHA-256: 8860b9e44240956d531386c3a96a7fe9da972aba110d894f76d59dba777fedf6
font_02_sfnt_off00013fe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FE6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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