Malicious PDF — malware analysis report

Static analysis result for SHA-256 af21b48e3e165392…

MALICIOUS

PDF

296.4 KB Created: 2021-12-26 12:03:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-21
MD5: a0bb9be0eca3b8968f8c65d36c6d099c SHA-1: 1223f377cf7492295e317bfe7e73fbf5ac38d90a SHA-256: af21b48e3e16539268423493bb6158915a580862e77b3e8f4ee8deab90e1630a
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9448

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://findmealocalpainter.com/insurazon/admin/userfiles/file/lunabu.pdf In PDF document text
    • http://polymerclaydoll.com/userData/ebizro_board/file/87479526134.pdfIn PDF document text
    • http://hamlineparkplaza.com/assets/amund/ckfinder/userfiles/files/47988883473.pdfIn PDF document text
    • http://myphamso1.net/uploads/files/36343937797.pdfIn PDF document text
    • https://www.nosgroup.org/admin/assets/ckeditor/kcfinder/upload/files/79298666643.pdfIn PDF document text
    • http://ms-beauty.com/ckfinder/userfiles/files/88721859484.pdfIn PDF document text
    • https://skyzoan.com/cake/beta/userfiles/file/2426062726.pdfIn PDF document text
    • https://bankubezpieczen.pl/userfiles/file/11364746949.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ccf9628aa9---bavuwajogutoviworu.pdfIn PDF document text
    • http://polipack.ru/content/file/rafopamule.pdfIn PDF document text
    • https://x-leather.com/radsportfiles/file/gapapogodomefelidalug.pdfIn PDF document text
    • http://sapientgenerator.ru/files/userfiles/files/20522880632.pdfIn PDF document text
    • http://conelser.hu/fck_uploads/file/kulukininipajeweleguwa.pdfIn PDF document text
    • http://spprp.pl/userfiles/file/mejasokipilo.pdfIn PDF document text
    • https://costarica4d.com/contents/files/zesusixo.pdfIn PDF document text
    • http://feedproxy.google.com/~r/Xvkpad/~3/UsNeCLCzgYg/uplcv?utm_term=individual+education+plan+nsw+templatePDF 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_off000432ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x432FF 18936 bytes
SHA-256: ada54727e6badccdf3e2f8bd284c7765eeabb42b37096211c0eef5b7134978ac
font_01_sfnt_off000463f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x463F9 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336
font_02_sfnt_off00047a9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47A9D 10780 bytes
SHA-256: 99cf992eb273a0e4d03e336c3f06063ef0d3ca6f37b84439c0d7cceb9022d5bb