Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b2fdbc2aa919d43…

MALICIOUS

PDF

83.4 KB Created: 2021-07-21 21:05:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 3612249bd7e877ae7d2a2fd886513ee7 SHA-1: 26ca59fec4254be8ef6d9c21de22712fe897861c SHA-256: 9b2fdbc2aa919d43450714743330b42e7557e5605f188b535c3c3ee6808161e6
96 Risk Score

Malware Insights

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

This PDF file was identified as malicious by an ML classifier and contains numerous links to external resources. Several of these links point to compromised WordPress sites or are structured as link farms on disposable hosting, suggesting an attempt to redirect users to malicious content or for SEO poisoning. The file's structure and the nature of the URLs indicate a likely distribution or redirection mechanism rather than direct content delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 5

  • 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://www.perchegouet.com/ckfinder/userfiles/files/xalofuboxupisan.pdf In PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb7ae892377---62801222164.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/95uogp8dm928c8nedd0ib949l0/gobixo.pdfIn PDF document text
    • http://efuturesthai.com/uploads/files/47248445002.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16099ef71043b4---vebotiluvipesejinanogulow.pdfIn PDF document text
    • https://promtong.com/promtong/temp/file/radotekaxonawogevotuzi.pdfIn PDF document text
    • http://wmhsclassof1977.com/clients/34196/File/tizezemikakuwulupa.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a64b3aeb18e---27114999219.pdfIn PDF document text
    • http://chaitraglaze.com/uploads/39519581380.pdfIn PDF document text
    • http://oguzlarotomatiksanziman.com/depo/sayfaresim/file/51157244887.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7537275567---15871518647.pdfIn PDF document text
    • https://henklinders.nl/henklinders/upload/files/sovixibokutamuk.pdfIn PDF document text
    • https://computerzone.pk/file/53958353718.pdfIn PDF document text
    • https://svingenieria.cl/userfiles/file/bugituzeroluxumepesuwura.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/8h50fd1kta458n79ckda14206o/39242247560.pdfIn PDF document text
    • http://immobiliareborghi.com/userfiles/files/67205270930.pdfIn PDF document text
    • https://retrofitoman.com/ckfinder/userfiles/files/difadogotixuvujosezajuz.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160719657b2e04---14268627108.pdfIn PDF document text
    • http://immobilieninvestors.eu/userfiles/file/fibunolemitotaxugonomuri.pdfIn PDF document text
    • http://ecogestval.com/userfiles/file/20415471578.pdfIn PDF document text
    • http://highlandhighclassof1962.com/clients/c/c3/c330a44b04b080977bf299ea430a317d/File/71476624879.pdfIn PDF document text
    • http://bahtiyardishekimi.com/fckfiles/file/bekekazegas.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=7+continents+and+5+oceans+map+worksheetPDF 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_off0000e205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE205 10996 bytes
SHA-256: 8dd76458680e5ac7cdd05d154021940167a93453fc93e2599757c9e02b51f2ec
font_01_sfnt_off0000fb8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB8F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000113a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113A1 17400 bytes
SHA-256: 994fa6f6a79e9f00a779815667ee961a864453cdb4774e212457a5ebd55e2761

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