Malicious PDF — malware analysis report

Static analysis result for SHA-256 eef7c04d50029d23…

MALICIOUS

PDF

85.0 KB Created: 2021-09-12 23:17:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 83ac5c73d09b98560f41b1b5118e92e2 SHA-1: 6668d2fddf60cfff7cbd37ac4cd9d786329fd44a SHA-256: eef7c04d50029d23dd66e8f3ad3486b445bc78b5e71f12d97c53c2844938d98f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. The document contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The presence of these URLs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 https://pixomot.ru/uplcv?utm_term=top+ten+pokemon+gba+games PDF link annotation
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613b263870ec9---59389157306.pdfIn PDF document text
    • http://soeurs-scjboran.fr/soeurs/upload/files/suvuva.pdfIn PDF document text
    • http://salonorganica.ru/upload/files/31830652161.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613912326e1b2---wimiwamikeribeve.pdfIn PDF document text
    • http://najlepsietorty.sk/uploads/fck/file/woguvasux.pdfIn PDF document text
    • https://weldingportal.it/userfiles/file/4523694030.pdfIn PDF document text
    • http://k-sta.kr/FileData/ckfinder/files/20210906_3478463B45E76464.pdfIn PDF document text
    • https://www.ftha.org/admin/ckfinder/userfiles/files/janegajogagomiw.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613747e594059---rexevidugixoponobuxotegut.pdfIn PDF document text
    • http://whuntex.ru/userfiles/file/vujofuvukogopitegiwiwe.pdfIn PDF document text
    • https://galerieportelouise.be/userfiles/files/libonikaxo.pdfIn PDF document text
    • http://paraglider24.de/pics/fotos/1/file/kafamibalonuboxuweben.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613e0cb208057---54670138103.pdfIn PDF document text
    • https://newsale.linyn.mobi/upload/ckeditor/pages/files/46218291814.pdfIn PDF document text
    • https://nocnepal.org.np/ckfinder/userfiles/files/tusuvugusezamagupigilus.pdfIn PDF document text
    • https://sonntag-immobilien.lu/userfiles/files/gekubemurifinoxovipal.pdfIn PDF document text
    • http://bidmitt.com/img/files/file/sawilofovukalilekejugimen.pdfIn PDF document text
    • https://infypos.com/infyposcms/media/26477733310.pdfIn PDF document text
    • http://poetische-malerei.de/web/editor/files/suzimijuzejexakinutopi.pdfIn PDF document text
    • http://techsystem.gr/data/uploads/ckeditor/files/61950987674.pdfIn PDF document text
    • http://peterpan1996.it/userfiles/files/41506866990.pdfIn PDF document text
    • https://ontogepszerviz.hu/editor_up/74603368155.pdfIn PDF document text
    • http://dzirerealtors.com/uploads/34194246732.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_off0000e4a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fcb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB7 18468 bytes
SHA-256: f1b8497eca92318c0c9058315c77a476c1906e88091762e61093a98348f70dd3
font_02_sfnt_off00012cc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CC6 10552 bytes
SHA-256: ded32234af609bc03a95765f850ac3659c6d87c276a8bece2ff79d82a7acde7b

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