Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5dbcb4d21376049…

MALICIOUS

PDF

85.5 KB Created: 2021-10-05 00:52:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-28
MD5: 8bc4499f9a985e95d08dd788b0b14f9c SHA-1: d34dc864904333b3e5b40a069aac723df81d0d03 SHA-256: c5dbcb4d21376049093d41fe9d7a11a0efd8a366276dd34f4a4da4c1b7bb67d9
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://bratislava.topenglish.sk/app/webroot/gallery/files/82938560676.pdf In PDF document text
    • http://xageunion.com/userfiles/file/jidujugirupetudosiwupe.pdfIn PDF document text
    • http://tolltisztitas.eu/userfiles/files/57209991881.pdfIn PDF document text
    • https://banderlogclub.ru/Files/file/45583737840.pdfIn PDF document text
    • http://planet-for-events.de/userfiles/file/83060228117.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/bevagorexenedelibowu.pdfIn PDF document text
    • http://sjhtractor.com/d/files/71149591210.pdfIn PDF document text
    • http://chineseclothingonline.net/File/navapibulekubep.pdfIn PDF document text
    • https://autohausnschmidt.de/userfiles/file/fekewisoviwow.pdfIn PDF document text
    • http://elvirajogsi.hu/ckfinder/userfiles/files/60580124751.pdfIn PDF document text
    • http://www.patriarca-batiment.com/ressource/site-image/files/puzuvalabiwisosa.pdfIn PDF document text
    • http://d-innovation.com/upload/files/42612166455.pdfIn PDF document text
    • http://tunesistudio.eu/userfiles/files/zuzapuzazamatu.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/2e8c4c10d3e25b59afbbf11503cc0f99/pexidekazagig.pdfIn PDF document text
    • http://studiomilano.eu/userfiles/files/65978044372.pdfIn PDF document text
    • http://tongchangkj.com/uploadfile/file///2021100103521465.pdfIn PDF document text
    • http://franklcalabreseattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/guxifavasoluxofifejade.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/161575023eac4a---18755899746.pdfIn PDF document text
    • http://business-plan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/kesekekoj.pdfIn PDF document text
    • https://soswzgierz.pl/web/uploads/files/70393599055.pdfIn PDF document text
    • http://mstreatmentadvances.com/userfiles/files/88105031150.pdfIn PDF document text
    • https://brothers-music.com/ckfinder/userfiles/files/jasig.pdfIn PDF document text
    • https://argentinaproduct.com/ckfinder/userfiles/files/merijopamulixivorebalosu.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16145f5b7a24fb---bilotumulixejujipotu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=sudan+iv+test+resultsPDF 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_off0000e782.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE782 19016 bytes
SHA-256: 04b5a42effff4ce290ec681870b1afba4679710696eebdec0f9ef5379694e144
font_01_sfnt_off000118e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118E0 10364 bytes
SHA-256: 2b8a17017b29e609b8c5be30cdbe876ba2b88a07b3bb1e02a4912185772421fb
font_02_sfnt_off0001306c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1306C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1