Malicious PDF — malware analysis report

Static analysis result for SHA-256 af28d1c70bbf47eb…

MALICIOUS

PDF

72.4 KB Created: 2021-09-30 15:19:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-21
MD5: 16298e144f39de9eaba8afbe9d16af55 SHA-1: 691c96716ba93bcee9075be86929b2f59ce33184 SHA-256: af28d1c70bbf47eb056e9b824395c297b47e0196f9170f1ccf811263dfc7e872
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ketchas.ru/uplcv?utm_term=temple+run+game+game+download PDF link annotation
    • http://mamtaniketan.com/userfiles/file/60243146711.pdfIn PDF document text
    • http://mirutte.com/newsfiles/files/lakodu.pdfIn PDF document text
    • https://mantyobras.com/userfiles/file/jutok.pdfIn PDF document text
    • http://weorderfood.com/uploads/files/kewilip.pdfIn PDF document text
    • https://phunhai.net/upload/files/vimadigizumiwuvuvale.pdfIn PDF document text
    • http://studiosantese.eu/userfiles/files/jumofivunelexifesetijiz.pdfIn PDF document text
    • http://otczenacts.com/media/files/zobotizuturi.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/addd0b278396cd8ff7e6eb2123b36776/tetapibusolisofikipif.pdfIn PDF document text
    • http://airelimpio.mx/img/editor/file/13996206604.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614b348ded7ca---sadekasitobixufo.pdfIn PDF document text
    • https://mjrspot.com/fckimages/file/18573101247.pdfIn PDF document text
    • https://ikitellirezistans.com/upload/files/13414833021.pdfIn PDF document text
    • http://nhatrangpalace.vn/app/webroot/upload/files/torezufotavapiliko.pdfIn PDF document text
    • https://chokysitohang.com/Uploads/userfiles/files/vonisazorikulepitovaxo.pdfIn PDF document text
    • https://cebubigsellers.com/userfiles/file/xaloxewosinubaweja.pdfIn PDF document text
    • http://www.louisefarmersmith.com/admin/ckeditor/ckfinder/userfiles/files/nepixugemaxo.pdfIn PDF document text
    • http://k-sta.kr/FileData/ckfinder/files/20210924_6D5A9815A65E39FC.pdfIn PDF document text
    • http://cpk.by/ckfinder/userfiles/files/lukexuvijokexeradevujezal.pdfIn PDF document text
    • http://topas.lt/userfiles/file/97759793165.pdfIn PDF document text
    • http://perseverance.cyou/updatefiles/file/25642948883.pdfIn PDF document text
    • http://ipublicity.cz/data/file/99786819116.pdfIn PDF document text
    • http://scales-center.com/shop/fck_file/file/61785010669.pdfIn PDF document text
    • http://land89.com/ckupload/files/piwepi.pdfIn PDF document text
    • http://alisawedding.com/upload/users/files/vetagozizake.pdfIn PDF document text
    • http://lifeline-sports.com/files/file/32997199589.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b606.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB606 17800 bytes
SHA-256: f24043572b2b21cc700229f3fa928f5921953dabb3b0eeb32076ea7a8c5484a2
font_01_sfnt_off0000e3fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3FE 10524 bytes
SHA-256: b4d547fee1ba6b34dd2d0cc5f52951e8645b432e8eef2ccadcf6237501029e6b
font_02_sfnt_off0000fbb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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