Malicious PDF — malware analysis report

Static analysis result for SHA-256 f99410841088ff03…

MALICIOUS

PDF

69.5 KB Created: 2021-09-28 04:45:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-13
MD5: 69f15527e2ca1fc6de5c2b1ce7914264 SHA-1: ab4e5473d23881363b56351ea5a77d59a0506fe5 SHA-256: f99410841088ff039637e04b44b1b4c51dad4b4698a5fae335f34b6de6f77358
164 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://studiecarriere.it/uploads/file/96086738687.pdf In PDF document text
    • https://sudhirsachdevaclasses.com/ci/userfiles/files/kajuzatigolarilevuwonis.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614a10ec374a8---91617541064.pdfIn PDF document text
    • http://irfanmakina.com/depo/sayfaresim/file/zuvimikikake.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132d283335a0---31496508161.pdfIn PDF document text
    • http://asja.ua/userfiles/file/21537371761.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/e70d1873a40d8dbfdb3068a988146c1c/vojonenidonidugusowuzij.pdfIn PDF document text
    • http://stin-verdon.fr/assets/Image/files/guniwazejatob.pdfIn PDF document text
    • http://lenosada.sk/editor_uploads/files/70190763825.pdfIn PDF document text
    • http://bienbao.net/uploads/files/torexifuropuwepofopexur.pdfIn PDF document text
    • http://racecross.com/upload/edito_fckeditor/file/nuxeli.pdfIn PDF document text
    • https://www.tzounakos-insurance.gr/ckfinder/userfiles/files/forodutelugiju.pdfIn PDF document text
    • http://dochoiotovn.com/uploads/userfiles/file/86057809827.pdfIn PDF document text
    • http://hotechike.com/files/files/novajaviwoziki.pdfIn PDF document text
    • http://www.iciparis.ru/ckfinder/userfiles/files/6236560168.pdfIn PDF document text
    • https://vleek.com/uploads/files/91463818716.pdfIn PDF document text
    • https://aksusu.com/upload/files/25396746579.pdfIn PDF document text
    • http://ituor.ir/basefile/chartermeinfo/files/50446345434.pdfIn PDF document text
    • http://www.lebedosapartotel.com/data/yukle/files/tatedanexi.pdfIn PDF document text
    • https://semut73.com/contents/files/71589018471.pdfIn PDF document text
    • https://gulf-rope.com/images/bulk_images/files/dikananisasifedawofekar.pdfIn PDF document text
    • http://greenlivinggarden.com/htdocs/UserFiles/file/11574644992.pdfIn PDF document text
    • http://sigmabhp.pl/userfiles/file/2708489484.pdfIn PDF document text
    • http://speed-r.com/js/upload/files/45504100817.pdfIn PDF document text
    • http://daehnfeldt.com/userfiles/file/wuvopejaveweju.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=best+pixel+art+games+for+androidPDF 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_off0000afa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFA2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c7b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7B4 14840 bytes
SHA-256: 0640e86f92cad8fd90fd490ef6f92e6db87f1e82250adf5d8aa8545a1cd5eeb2
font_02_sfnt_off0000ed46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED46 10996 bytes
SHA-256: 1f6973cfb1eb990ebe29c7e4f6e5eedb53cdcbd996e8727e801161430cdbd999