Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4f09edda9f85f2f…

MALICIOUS

PDF

77.1 KB Created: 2021-12-12 14:00:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-07-01
MD5: c1abbfd531295e21538c5d4e721afe50 SHA-1: d4aade8c1fad4e2e191d4aae393f87b0a81d9df6 SHA-256: a4f09edda9f85f2f370f9e643e6a075ef83fa02c1bf2ab373fcaba0e55dfcad8
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 http://association-femmes-relais-aulnay.communication-pro.fr/public/1160/contenu/file/lofedabopunetajefakavuduf.pdf In PDF document text
    • http://ngocphuocjsc.com/public/default/ckeditor/files/92405203927.pdfIn PDF document text
    • http://membranekeyboard.pl/_data/file/40131305121.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/2379c29374b329f4f0d47fa8e2e2cf39/lubekuginu.pdfIn PDF document text
    • http://autothudo.vn/upload/fck/file/31995236905.pdfIn PDF document text
    • http://bazoolwddd.specialty-match.com/upload/files/76050130791.pdfIn PDF document text
    • http://bidadapatidar.com/userfiles/file/sixametuk.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16180b0096ca76---sijasapixebetipimadana.pdfIn PDF document text
    • http://haciogullari.com/depo/sayfaresim/file/89190428490.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1614bb8d1f3d8b---51483737070.pdfIn PDF document text
    • http://floralojistik.com/userfiles/file/kuxapalikokewot.pdfIn PDF document text
    • http://barcelonasixtytwo.com/userfiles/file/8201361499.pdfIn PDF document text
    • http://mastervgtour.by/var/upload/file/tidafolowemizabi.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/161af45cde742b---fuxovuzobedisovadoko.pdfIn PDF document text
    • https://cobaltinc.org/userfiles/file/favobumejujupavaxig.pdfIn PDF document text
    • https://e-casainteligenta.ro/userfiles/file/forofiritulokukovepuzitow.pdfIn PDF document text
    • http://xn--b1agjlwjc3g.xn--p1ai/ckfinder/userfiles/files/48364676015.pdfIn PDF document text
    • http://architetturaurbanistica.it/userfiles/files/fafudizutuk.pdfIn PDF document text
    • https://contact-house.com/fckeditor/upload/file/24691244728.pdfIn PDF document text
    • https://www.iieng.org/editor/ckfinder/userfiles/files/36885933518.pdfIn PDF document text
    • http://nikolalepojevic5.com/multimedia/file/7468679996.pdfIn PDF document text
    • http://maximaviajes.com/FCKfiles/file/lazavuxodirudijidi.pdfIn PDF document text
    • http://yljinbiao.com/admin/upFile/2021-11/file/joxodumuwinu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/EqozwcbAC44/uplcv?utm_term=why+does+my+proform+treadmill+suddenly+stopPDF 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 extracted file (font_00_sfnt_off0000c619.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0000c619.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c619.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC619 18460 bytes
SHA-256: 2d29f71ac80968696a62dd97cbff70086c6efac42b950b41f8252c8b80ddbd81
font_01_sfnt_off0000f698.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF698 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336
font_02_sfnt_off00010d3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D3C 10968 bytes
SHA-256: 331e352c2b8bda00a0a2f1a8bc0f6f4a109b1f9101a1451535301118fbf1057e