Malicious PDF — malware analysis report

Static analysis result for SHA-256 8880def09584f09b…

MALICIOUS

PDF

90.4 KB Created: 2021-06-26 01:10:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 89699883f3a8a284da7d51b1abab4ab6 SHA-1: 137ed31022503b5a0d2ba5bef6764c7638e61668 SHA-256: 8880def09584f09b9679a6fd1cfa6a00504f0e90a6cf010815cd3380f5162838
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to numerous URLs hosted on compromised WordPress sites and disposable domains, suggesting a phishing or malware distribution attempt. The document body is unreadable, but the presence of many external links indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/fdc60eba84c77ade2ce67339b9ac8271/ratosuwivejonemi.pdf In PDF document text
    • http://blissrenewbeauty.com/newerac2c/userfiles/file/47003333591.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/09301d34cd58b37e56a61cc7b12d4111/26689890155.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/mibamadu.pdfIn PDF document text
    • https://247hvac.ca/fabulous1/uploads/files/nesufaxulovexulawezup.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/4e48c85b4d11ed56fcac90ff153bd54b/70263908181.pdfIn PDF document text
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/5e16fe6e7a1a95f907fbdf0f56dd1fb5/64149039703.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/16da3e0cc8d5c7d8004710e483385141/pasodav.pdfIn PDF document text
    • http://mini-garden.ru/userfiles/file/loboramenewiparamibupo.pdfIn PDF document text
    • https://sherwoodchamber.org/ckfinder/userfiles/files/zuzuduberolasizemagebinu.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/16076737042b4f---ladar.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/50565205753.pdfIn PDF document text
    • http://mashtalkandil.com/userfiles/file/17298855094.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/bac3539617d3021b4813d8bc42174b94/tukufobujeliladobo.pdfIn PDF document text
    • https://alice-immo.com/userfiles/file/zoweforololimesasabemaxib.pdfIn PDF document text
    • http://datev.hu/ckfinder/userfiles/files/91532119858.pdfIn PDF document text
    • https://www.treehousecare.org/wp-content/plugins/formcraft/file-upload/server/content/files/16082354d9f50c---96668697117.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ca5fff83a59---78070354049.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6a6195a1f0---67963701523.pdfIn PDF document text
    • http://portalcom-b2b.es/img/user///file/_0441136001620711785.pdfIn PDF document text
    • http://box8websites.com/ckfinder/userfiles/files/35152874461.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609fa744e7469---sezaxosajok.pdfIn PDF document text
    • http://hayatteknoloji.com/webimage/file/95919476703.pdfIn PDF document text
    • http://bociany.sk/media/file/sosorobujuredadulod.pdfIn PDF document text
    • https://alatheir.com/atheirwsfiles/file/jejizezidenitubigof.pdfIn PDF document text
    • http://orkoien.com/userfiles/files/242157843.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/160ac061d18078---pifelozafaverixav.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=how+to+clean+up+cat+vomit+from+carpetPDF 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 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_off00010025.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10025 16660 bytes
SHA-256: 2f2afc1b3dbc81d2f6227bc44fcf6dcd146c60d8d37d850caaa1935e721cce26
font_01_sfnt_off00012b71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B71 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014388.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14388 10716 bytes
SHA-256: 387a0352dbab8c230c5b53aac8065aa7e60c572a9ff3e8a0aba892da10c38209

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