Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4f0e9ed92741e84…

MALICIOUS

PDF

413.6 KB Created: 2021-12-28 03:05:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-07-02
MD5: aeaf61d8413b5d4f7a496161dd1da788 SHA-1: d10c790faf8ebaae5fcfe51060a10ea9e6eec5be SHA-256: a4f0e9ed92741e84189b6983a9d1001c71d2f33471c2556a08c7de99c15828f9
136 Risk Score

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4725

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
  • 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.
  • 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://bangkok.union.travel/ckfinder/userfiles/files/samoxeratifexuw.pdf In PDF document text
    • http://bckbytow.naszbip.pl/img/upload/files/nalunipozonoxoxorolo.pdfIn PDF document text
    • http://akgwealthplanner.com/crm/files/mijavajerizufobasuzu.pdfIn PDF document text
    • https://dobski.pl/userfiles/file/55827025890.pdfIn PDF document text
    • http://modaxch.com/userfiles/files/27467370608.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1615e4d7f26ab0---jekidoxulof.pdfIn PDF document text
    • http://www.gulbaharsigorta.com/contentData/file/79764897461.pdfIn PDF document text
    • https://lbjgold.in/ckfinder/userfiles/files/wenegiz.pdfIn PDF document text
    • https://jiu-hang.com/upfiles/editor/files/xanesoz.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/0ce745643065d2f329268d61c293b994/fodupopatebinoradilavo.pdfIn PDF document text
    • https://www.netcorp.hu/data/editorfile/96959836368.pdfIn PDF document text
    • http://m3hotels.com/userfiles/file/dugebolupiwitoje.pdfIn PDF document text
    • https://netron.pt/app/webroot/media/files/66124171590.pdfIn PDF document text
    • http://canadianrockies.info/files/file/55469244532.pdfIn PDF document text
    • https://dulsuc.cl/userfiles/file/dofonuzaxilinusilez.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/161994365aebfa---nijilabufivuroxilubabug.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161b7530ea5b1a---nikewo.pdfIn PDF document text
    • http://thrifty-uy.com/files/others/wijewejileg.pdfIn PDF document text
    • http://theemasternetworker.com/ckfinder/userfiles/files/41236525940.pdfIn PDF document text
    • http://vektorma.ru/uploads/assets/file/fevef.pdfIn PDF document text
    • https://harom.ro/files/file/koliles.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/532ae6e58f127d62fd0fb0858decb17b/69952762365.pdfIn PDF document text
    • http://feedproxy.google.com/~r/Xvkpad/~3/TSvcnjQ06Jg/uplcv?utm_term=interview+questions+with+answers+pdfPDF link annotation
    • http://s250801404.onlinehome.fr/img/uploaded/file/59513185903.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_off00060229.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off00060229.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00060229.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60229 20508 bytes
SHA-256: 849b7fd72f6d131243baba49668d590a283ed2481b5420b045a3ed28f8778cf0
font_01_sfnt_off000637bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x637BB 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336
font_02_sfnt_off00064e5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64E5F 10896 bytes
SHA-256: 940cc03c96f1b7c45ee7b4ee9e2bf51f99496ade08fe3403009a0bf12d36ef90