Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa8303c8e81bdc18…

MALICIOUS

PDF

80.3 KB Created: 2021-11-03 16:30:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-06
MD5: d7beee1fabde652f1ce1cac98ce0f0e6 SHA-1: ec28328cf2c743d277627725e4533e84c5810d37 SHA-256: aa8303c8e81bdc183ee52a55dda8596ec6fb3ca85e4adb8dab9023d22897a3c9
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133db72827c5---zozowitomejeneru.pdf In PDF document text
    • http://chamdure.com/DATA/files/falumotosawusonajonazema.pdfIn PDF document text
    • http://sattosushi.com/uploads/files/rebibikixodixolewepikukal.pdfIn PDF document text
    • http://viral-list-machine.com/ckfinder/userfiles/publics/files/fudowumafoza.pdfIn PDF document text
    • http://cosyromania.com/media/file/664518766.pdfIn PDF document text
    • http://fine-trading-knotwork.de/uploads/media/bijikugomo.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/jfrahs9f8dhgs1jmnrbh80eum8/pefetobapofaforalaz.pdfIn PDF document text
    • https://sunwayhk.com/louis/STARKGROUP/ckfinder/userfiles/files/negogaw.pdfIn PDF document text
    • https://jooli.ru/ckfinder/userfiles/files/80921818223.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/16178f007b0bde---watiluvifanuzezojafuramus.pdfIn PDF document text
    • https://diphong.com/uploads/64609866288.pdfIn PDF document text
    • http://tumwebthailand.com/ckfinder/userfiles/files/guxitoladegivulufas.pdfIn PDF document text
    • http://phutungtdc.com/upload/files/19646239715.pdfIn PDF document text
    • http://sanmorales.es/userfiles/files/86019322722.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613edceb73862---33334308319.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613ffbca69a05---8708307866.pdfIn PDF document text
    • http://stefanourso.com/public/userfiles/file/galiwanemak.pdfIn PDF document text
    • http://khodahoanglang.com/admin/webroot/upload/image/files/bepikakopibonu.pdfIn PDF document text
    • https://laetitiabernard.fr/images/file/dewefugud.pdfIn PDF document text
    • https://radiosmile.hu/upload/file/79693050841.pdfIn PDF document text
    • https://vinatech.com/userfiles/file/62577198643.pdfIn PDF document text
    • http://dongtienlamnghiep.com/upload/file/jemevagevebewaninovuwaxit.pdfIn PDF document text
    • http://mayinmaunhat.com/upload/files/xogezejoguzadomajivilek.pdfIn PDF document text
    • https://msiutilities.net/documents/masegorisatosisukuvenodu.pdfIn PDF document text
    • http://hyundainhapkhau.net/upload/files/55859784093.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/227ea9950b406ec9ac9978fce03eea36/xefenepokuramifem.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/4dZi1sgP-vI/uplcv?utm_term=meaning+of+measles+in+englishPDF 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_off0000d247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD247 19076 bytes
SHA-256: dfd59d79a64b8c08c2c0e85c5834beec70317a384155973d7e569db2ecf7133e
font_01_sfnt_off0001041c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1041C 10456 bytes
SHA-256: 4d97fde3361217fbecff7a087b5b24aba2684500cd8de7f79f527f36011c1d60
font_02_sfnt_off00011b9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B9E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1