Malicious PDF — malware analysis report

Static analysis result for SHA-256 4af39ece51ea14cd…

MALICIOUS

PDF

88.8 KB Created: 2021-10-11 16:53:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-06
MD5: a3bef33e93aa84853d0139111cbe0329 SHA-1: 298b396c82c268a5add15fec01644065ab5ef599 SHA-256: 4af39ece51ea14cd0a60b92679883f54ee491a5759851338c3ead89ceb14247c
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://floridainvestment.cz/files/file/80122043714.pdf In PDF document text
    • https://breedlife.com/upload/files/45619312708.pdfIn PDF document text
    • https://turbooto.vn/upload/files/58334950996.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/d657f23950289ced41446015d52934fa/55562514741.pdfIn PDF document text
    • https://ebal.ro/app/webroot/files/userfiles/files/marimilubonetelikerel.pdfIn PDF document text
    • http://cesurmakina.com/userfiles/file/lusoza.pdfIn PDF document text
    • http://younewstoday.com/task/userimages/file/rakadamufi.pdfIn PDF document text
    • http://hla.vn/upload/files/pevogajoganogosez.pdfIn PDF document text
    • http://yaan121.com/uploads/files/202109090023041219.pdfIn PDF document text
    • http://w-w.cn/isee/pfm/cms/uploadfile/fck/file/tajibefafig.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/378ukagm9erb0hjj1fbncutn7h/56141167287.pdfIn PDF document text
    • http://vcelari.naceradec.cz/includes/ckfinder/userfiles/files/bixadonulen.pdfIn PDF document text
    • http://nwatchonline.net/userfiles/file/pegizeruwufewok.pdfIn PDF document text
    • http://nemdanangpho.com/uploads/2021-10-07/images/files/tejulo.pdfIn PDF document text
    • http://hiniceshine.com/upload/77226123515.pdfIn PDF document text
    • http://sujitonweb.com/userfiles/files/31400034299.pdfIn PDF document text
    • http://onlytech-tunisie.com/userfiles/file/36849580876.pdfIn PDF document text
    • https://a-pointpro.com/cms/ckfinder/userfiles/files/miworafalevopa.pdfIn PDF document text
    • http://xenangheli.vn/public/files/gowibovidugejudomip.pdfIn PDF document text
    • http://cdio.vn/uploads/userfiles/file/94404267637.pdfIn PDF document text
    • http://medicalproduct.hu/images/files/58558134349.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/q88jku0op40ta5uih2igls7dao/filebeb.pdfIn PDF document text
    • https://postelezmasivu-liberec.cz/ckfinder/userfiles/files/92713005194.pdfIn PDF document text
    • http://feedproxy.google.com/~r/Xvkpad/~3/HKUGBsJGI0E/uplcv?utm_term=love+at+first+kiss+moviePDF 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_off0000f98e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF98E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000111a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111A0 17520 bytes
SHA-256: 80041b483ecd6bf55920f7cb3d8b93556f6c4b1f96de1e48086376cafb1c16a5
font_02_sfnt_off00013e9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E9E 10340 bytes
SHA-256: 671d538636e92a0b616d823c557188eaf165f0dfa668a08c5dc7a24d8b7e5fc8