Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4f52f267a457635…

MALICIOUS

PDF

351.5 KB Created: 2022-02-01 07:35:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-07-02
MD5: e0d4934923862ac89226015033a0f8c4 SHA-1: f77ea5f4eaf14512fadbf643d25c7edbdef015c8 SHA-256: a4f52f267a457635ab4791dc6d75688888fbe22ef9b59b2d43bc7f66ef3b037f
206 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.6543

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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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 https://lazav.co.za/XSRYdR1H?utm_term=lake+amador+fishing+report+2018 PDF link annotation
    • https://cryptoshift.be/anaeter_capital/siteadmin/userfiles/files/14904754201.pdfIn PDF document text
    • https://autoteam.in/ckfinder/userfiles/files/riresiritabiwelavobajere.pdfIn PDF document text
    • http://leasingtowers.com/ckfinder/userfiles/files/13769535584.pdfIn PDF document text
    • http://freewest.at/34905747662.pdfIn PDF document text
    • https://catbasailing.com/upload/fck/file/11335457790.pdfIn PDF document text
    • https://hobbes-group.com/upload/files/pamepimezuvuvanupozepu.pdfIn PDF document text
    • http://madang.eu/f_pds/fck/file/xoguralas.pdfIn PDF document text
    • https://biogenetixpharma.com/ci/userfiles/files/86776178437.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16195fac72c582---wezevekit.pdfIn PDF document text
    • http://gordostcrista.ru/userfiles/file/91359600424.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16182529284287---93086555607.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16177c04ed55ff---boxawoduveve.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1619c88433d9a9---27558183573.pdfIn PDF document text
    • http://basaritarim.net/admin/editor_resim/file/78226225180.pdfIn PDF document text
    • https://asiantms.com/ckfinder/userfiles/files/50265265667.pdfIn PDF document text
    • http://cu-hinothai.com/ckfinder/userfiles/files/baxebabusosaruzimibej.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/48583771571.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1619ea9ff93228---ferogunovemomejixax.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161846ff2a10bc---jogesawimebuwip.pdfIn PDF document text
    • https://pasationtravellers.com/root/FCKeditor/file/pafasonuxisemu.pdfIn PDF document text
    • http://skolka.pencin.cz/soubory/file/32631695869.pdfIn PDF document text
    • http://pollibox.com/assets/uploads/files/6529007601.pdfIn PDF document text
    • https://www.adamtraveljordan-ru.com/mypanel/includes/ckeditor/kcfinder/upload/files/ruxarawezikaxuvewipox.pdfIn PDF document text
    • http://ambulatorioveterinariocigliano.com/userfiles/files/lisarenig.pdfIn PDF document text
    • http://kindergartenhelden.at/upload/file/41455366856.pdfIn PDF document text
    • http://ratchee.com/ckfinder/userfiles/files/nakofajiwe.pdfIn PDF document text
    • https://pasationtravellers.com/root/FCKeditor/file/54170301868.pdfIn PDF document text
    • https://lifecareproduct.in/ckfinder/userfiles/files/sexudetidadodaritep.pdfIn PDF document text
    • http://ondrejkocar.cz/img/file/lupelamidozirop.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_off000510f5.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off000510f5.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000510f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x510F5 11452 bytes
SHA-256: 72783f68eb50dde7dca438d777d3826bc7ed616189784450b9e1a7852ba250bc
font_01_sfnt_off00052ba4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52BA4 16968 bytes
SHA-256: b5c23f2ca21538f8a3c2deda38ef41e8f6e8f8eb29a6a5cd61e0dfef6cf7e687
font_02_sfnt_off000557d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x557D3 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336