Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d8a4563e9af63c4…

MALICIOUS

PDF

74.2 KB Created: 2021-10-05 12:17:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-18
MD5: ff89093b6729f32826b4dc9519c25a32 SHA-1: 11099b3e15694b378810877fa47ec5d5ab9cb069 SHA-256: 5d8a4563e9af63c40e4eee751d77ee6640c348fbb3468b79f97b1fe34caea008
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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://testplanet.nl/uploads/files/88755501439.pdf In PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/vqk6ufacu77icr7ak2k60c93tk/43793520170.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/luvugomutixalebivuzinug.pdfIn PDF document text
    • https://nucamsa.es/userfiles/files/bovutikilajogajejosur.pdfIn PDF document text
    • http://irvinenott.co.uk/ckfinder/userfiles/files/12546760433.pdfIn PDF document text
    • https://magnanerie-cazilhac.com/userfiles/file/38294502888.pdfIn PDF document text
    • http://www.juthamasclinic.com/upload/finder/files/85017011102.pdfIn PDF document text
    • https://lensprovn.com/ckfinder/userfiles/files/vitajegadigupulaxewumug.pdfIn PDF document text
    • https://thietkewebseo.com/webroot/img/files/xulamirafojoxigumagokow.pdfIn PDF document text
    • http://sellmysayarah.com/userfiles/files/vokinasiximubajeduni.pdfIn PDF document text
    • https://griffithnorthsideapartments.com/ckfinder/userfiles/files/83427779091.pdfIn PDF document text
    • https://total-sport.pl/img/upload/files/mamefomuda.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/1615637309de97---gopuwuxomuwukirudojuke.pdfIn PDF document text
    • http://gespk.com/userfiles/file/70355910577.pdfIn PDF document text
    • http://yepuco.com/uploads/files/nikiz.pdfIn PDF document text
    • http://thenext.pk/userfiles/files/tasibakugafasaxibadidu.pdfIn PDF document text
    • http://tongchangkj.com/uploadfile/file///2021091107041655.pdfIn PDF document text
    • https://oykufestivali.com/ckfinder/userfiles/files/81803415473.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/161380a95e1277---joked.pdfIn PDF document text
    • http://thaimassagemodel.com/ckfinder/userfiles/files/7714017942.pdfIn PDF document text
    • http://zhymwz.com/upfile/file/xaxojat.pdfIn PDF document text
    • http://xn--80aaaaadfwa5aftjhxrkcrg8iwc.xn--p1ai/pict/file/51996260702.pdfIn PDF document text
    • http://peter-scherer.de/userfiles/file/29879314722.pdfIn PDF document text
    • http://hcm-invoice.vn/hinhanh_fckeditor/file/10957406328.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16137a615da5a2---54344081085.pdfIn PDF document text
    • http://ex2010.com/uploadfile/file/2021090110525573499.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=circle+and+its+componentsPDF 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_off0000c00e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC00E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d820.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD820 16664 bytes
SHA-256: 4a2bdd541fa46a89595170c9aee62f37256864bd290cdd79e521fceea1cf298d
font_02_sfnt_off00010294.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10294 10708 bytes
SHA-256: 1807a5aeb11d78b572e684e1660a7d005998d59e38b800f729a4776b73e09604