Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4f20f344abe0f7e…

MALICIOUS

PDF

70.2 KB Created: 2021-11-09 05:15:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-07-01
MD5: 24b5bbef49d5f05ffcf59220ba428ada SHA-1: 72f872b540700a2398d06214d1373109de7d745f SHA-256: a4f20f344abe0f7e903944be778777d2021259d6209cc362ae7c9f0f61f9726f
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 https://yauspeshen.com/ckfinder/userfiles/files/sarifitinutudetonu.pdf In PDF document text
    • http://www.arborvitae.cz/ckfinder/userfiles/files/megosireboxo.pdfIn PDF document text
    • http://aroma-es.site/yamituki-n/uploads/files/89954124429.pdfIn PDF document text
    • http://dissanna.com/temp/fckeditor/file/rolamowefol.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/9e2c1bfd211143940a27736bb5475447/26519053056.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/fe5sv2eq541fillijqtsaiet8u/nirijenukavadugukubisopej.pdfIn PDF document text
    • https://thefencedocumentary.com/adminfiles/file/tutemukejoxunagebafus.pdfIn PDF document text
    • https://www.albriug.com/static/editor/ckeditor/ckfinder/upfile/files/39856812142.pdfIn PDF document text
    • http://xsteelstock.com/d/files/timawapufidiwigow.pdfIn PDF document text
    • http://hysansam.com/fckeditor/userfiles/image/zarawokujob.pdfIn PDF document text
    • http://luyenthidhcanhsat.com/Images_upload/files/rifevevamigog.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/161370792d8cbd---51857926037.pdfIn PDF document text
    • https://etravelbox.com/scgtest/team-explore/uploads/files/xuvasetinixilulixa.pdfIn PDF document text
    • https://balticseaheritage.com/res/wysiwyg/file/sotavixodazuvamedumokuso.pdfIn PDF document text
    • http://kingbikeonline.com/images/upload/File/22219637821.pdfIn PDF document text
    • https://legyenegyjonapod.hu/userfiles/files/410231607.pdfIn PDF document text
    • http://mmprogetti.it/userfiles/files/bamakorenakomebeg.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/5bhJmFgkeCE/uplcv?utm_term=miller%27s+ale+house+daily+specialsPDF 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 extracted file (font_00_sfnt_off0000ac6e.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0000ac6e.bin)

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ac6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC6E 18296 bytes
SHA-256: c610bc2f0e78f75829b944ffded749d2b43e14ea69bbe2731cdf7d7e84e212ed
font_01_sfnt_off0000dbf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF8 10648 bytes
SHA-256: f22cf3d4d0552acd75a476fe9d17e853897fea06fb2c865fe700c86b87cd30ad
font_02_sfnt_off0000f481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF481 16540 bytes
SHA-256: 45015263e28dbf00792e0fa83ae0fb9123af5110209f191c00797c49350166ef

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