Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d8edc3d10efc635…

MALICIOUS

PDF

91.7 KB Created: 2021-08-15 05:03:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-18
MD5: ba1ba7cac8839a7c786b9f38f2e56b95 SHA-1: f1ddb4dda03e4df3ae157270d4489c118eca16e1 SHA-256: 5d8edc3d10efc6350bf62d4380a73dfa03d54031503c6939ae555e526be53fe5
164 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 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.
  • 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://coretry.ru/uplcv?utm_term=cuaderno+de+actividades+para+ni%C3%B1os+autistas PDF link annotation
    • http://areaengineeringsrl.eu/userfiles/files/20692332994.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/f23fbd60998caf6073f1272d14d03099/kikinunolesosexeka.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/othfeqjbri4hinj1a5grru5rct/32447059483.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606c987c5dd01---muvira.pdfIn PDF document text
    • https://fruzsiflame.hu/userfiles/file/kowinafogefedumekefiso.pdfIn PDF document text
    • https://talaa-obour.com/webmisr/uploadwebmisr/file/37188615978.pdfIn PDF document text
    • http://garage-fuji.jp/js/upload/files/nulabawal.pdfIn PDF document text
    • http://drukarnia-skawina.pl/app/webroot/media/files/magutusobexidu.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608a1578e6c26---fosezisebexajopetutir.pdfIn PDF document text
    • http://steakclubhn.com/campannas/file/28193793891.pdfIn PDF document text
    • http://avstralianature.ru/ckfinder/userfiles/files/50084365073.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607fab4bb8ed8---giwijufaratozu.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/3710d9f2539f7d6c18d385cde1cb7098/bixisor.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c3aff50163c---xiregerukawok.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16103c7318b101---pusekelisinidazopowiz.pdfIn PDF document text
    • http://batiment-tunisie.com/userfiles/file/zedubidasezovifeso.pdfIn PDF document text
    • http://tantusmarina.com/UserFiles/file/59672402215.pdfIn PDF document text
    • http://poltinik.ru/userfiles/file/13382976474.pdfIn PDF document text
    • https://tonthephunglan.vn/upload/files/95368782405.pdfIn PDF document text
    • http://sp3siemianowice.pl/userFiles/files/10781386290.pdfIn PDF document text
    • http://vinabomi.com/uploads/userfiles/file/17746982204.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 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_off0000fd94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD94 10864 bytes
SHA-256: 63c4936b053a0b3693250a47f87b63a40ffae9c2a1066f1aa410f69a623aed39
font_01_sfnt_off00011697.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11697 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012ea9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EA9 18948 bytes
SHA-256: b8652d811871bb000a0eddb55801a4c2ba99456f325cd3906c6b28438b949b4e