Malicious PDF — malware analysis report

Static analysis result for SHA-256 76a040125f5e7029…

MALICIOUS

PDF

84.4 KB Created: 2021-07-07 14:52:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5c573355437bde76511744c5f9e410da SHA-1: 0a65fb909484ad875a91e4a0f4aa0760d092dbbe SHA-256: 76a040125f5e7029673eb36bc4a0b4bdc77272e064044a62f93e521d420c3f73
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous external links, many pointing to compromised CMS upload directories and disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely involving exploitation for client execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://smidgel.ru/uplcv?utm_term=harry+potter+quotes+sirius PDF link annotation
    • http://ahkjt.com/upfile/file/wifejizafimunifobexis.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160722d96d9139---4801509156.pdfIn PDF document text
    • http://hoteldazegliotorino.com/userfiles/files/jilavegakilo.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/982d963bd2982d6b61e12186a6bfc798/lumiraxorokarasavobutus.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/6fdf48bfd16c1a99b7f5325f6c3f4bd7/jemujugalosesawix.pdfIn PDF document text
    • http://yogo110.com/userfiles/file/61030961774.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/95153468088.pdfIn PDF document text
    • https://easy2ticket.com/upload/files/weximetu.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c188931746---jikeros.pdfIn PDF document text
    • http://kpotplace.com/uploads/files/zojetaporovate.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/baf2fa04d1da2910f8c9804e709c1084/38671794688.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/f526ff7bd3fc23d47a2f4383cf175b70/18141258975.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b904e5c7943---67968410581.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/4cbd104a8990bc88500868fad772d626/68740029698.pdfIn PDF document text
    • http://bsl-trans.ru/admin/ckfinder/userfiles/files/24057855310.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/sefk2qqjo5omektmu8gi2lhai2/zokerulafudizivagoperine.pdfIn PDF document text
    • https://opuntia.eu/wp-content/plugins/super-forms/uploads/php/files/708a656b5d5da5d5d318a36abd66b1de/2962529275.pdfIn PDF document text
    • https://mamotato.ro/userfiles/file/mekaruzaxaluwatopesakasej.pdfIn PDF document text
    • http://teleserviciomalaga.com/ckfinder/userfiles/files/xalojurozazagaforud.pdfIn PDF document text
    • http://resetimpianti.it/reset/public/file/56446653769.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088f0ceef06e---farepobupizalubexorigezo.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_off0000e8e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010100.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10100 10448 bytes
SHA-256: 9adee9196e4e2ecd75e52275585fc2cdbb5ceb275c82240fcfabb6c0f2dbc1c6
font_02_sfnt_off000118d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118D3 16952 bytes
SHA-256: 460190838a5549f30b99e0f3b6888797bba264c786f59fce88253e04e8214bc9

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