Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4ff25d1c5ead879…

MALICIOUS

PDF

208.4 KB Created: 2022-04-17 19:20:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-07-01
MD5: 44df10480f4d791ed164a47a1979de98 SHA-1: 3af6abf3d10a257eb5d19d80e19d95eadb9dda07 SHA-256: a4ff25d1c5ead8794a97ff8d5a3eff1b5e722862fb2d8b84b714a1b6e767658d
174 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.8281

Heuristics 7

  • 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.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://mifuj.co.za/XSRYdR1H?utm_term=macromedia+dreamweaver+8+full PDF link annotation
    • https://www.ijdsir.com/ckfinder/userfiles/files/bogisi.pdfIn PDF document text
    • http://www.avtoschool71.ru/kcfinder/upload/files/14546838234.pdfIn PDF document text
    • https://tuyendung.tlipgroup.com/upload/images/files/12551794052.pdfIn PDF document text
    • http://global-leasing-management.com/uf/file/1007738903.pdfIn PDF document text
    • http://gat-asset.com/CKEdit/upload/files/duzivemajowewiloxata.pdfIn PDF document text
    • http://wonikqnc.com/upload/editor/file/1645368685.pdfIn PDF document text
    • https://sharkovinkom.com/sharkovinkom.com/ckfinder/userfiles/files/fezalevojaxijunekut.pdfIn PDF document text
    • http://vasudevindustries.com/userfiles/file/70233429312.pdfIn PDF document text
    • https://xtremefitksa.com/ckfinder/userfiles/files/76661897157.pdfIn PDF document text
    • http://ks-system.co.uk/ckfinder/userfiles/files/55921858200.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/l66437kkf5aiik089ld6j3mag2/48690973109.pdfIn PDF document text
    • http://medcentervrn.ru/userfiles/files/12321936998.pdfIn PDF document text
    • https://highendteen.com/userfiles/files/29467302268.pdfIn PDF document text
    • http://www.historialmarista.org/js/kcfinder/upload/files/31152285697.pdfIn PDF document text
    • http://interfacetravels.com/app/webroot/js/ckfinder/userfiles/files/vebekusu.pdfIn PDF document text
    • https://vinacomvietnam.vn/uploads/news_file/vowanenu.pdfIn PDF document text
    • https://chulintemple.org/CKEdit/upload/files/45626534263.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16210cb2452c95---jagafuvifilezitoripumarib.pdfIn PDF document text
    • http://mrybalko.ru/files/22610051238.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/162366c3e18e9c---saloranululawesulo.pdfIn PDF document text
    • https://matfreklam.com/calisma2/files/uploads/xitimijorib.pdfIn PDF document text
    • https://www.conepe.org.br/public/ckeditor/kcfinder/upload/files/29494033656.pdfIn PDF document text
    • https://ashleymongolia.mn/uploads/files/bazibodozimiwigali.pdfIn PDF document text
    • http://humanitool.ru/userfiles/file/72779976638.pdfIn PDF document text
    • https://butzbacher.turnpoint.jo/app/webroot/upload/files/popirarebadudonaxufibo.pdfIn PDF document text
    • https://robalton.es/Albums/images/file///93373794783.pdfIn PDF document text
    • https://easyown.ddproperty.com/datas/files/66379033339.pdfIn PDF document text
    • 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_off0002d21e.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0002d21e.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002d21e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D21E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0002ea30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EA30 18376 bytes
SHA-256: 0ace9cee277c0f052e03f438ad8b795d63453dccfcd143e15925f678f53589fc
font_02_sfnt_off000319d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x319D2 10720 bytes
SHA-256: eb8ca0961e3b1bdf25835968a2bbb5a9a1dc371e742f238b7fb857e32776dcb7