Malicious PDF — malware analysis report

Static analysis result for SHA-256 263d95e53971b44d…

MALICIOUS

PDF

96.2 KB Created: 2021-06-28 22:00:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: e1c5d35f243cd078a976042f7c357427 SHA-1: 2b3d578a225d6d4ae22e2f31e18c70c66f10b53b SHA-256: 263d95e53971b44d121efba32e150e6c8840c86aa23c722af5e5e81d49c94809
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier. It contains numerous links pointing to compromised WordPress uploads and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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://garglob.ru/uplcv?utm_term=crpc+notes+for+law+students+pdf PDF link annotation
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a2a85d9b089---satogosugi.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/160af94c63f165---74171958075.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/16077f0b724b92---deginamegozumajuwinukate.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/7442085473.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/2a9jfradu3704317ujdqpm4aas/40648313498.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/347df850e9cc6ca3c56c8cc6711844b1/94469281016.pdfIn PDF document text
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/a95d90a6fa248940172b9dee910fb38e/34398561633.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160948d734fa9e---nigav.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/purumaxetej.pdfIn PDF document text
    • https://muratay.nl/userfiles/file/xobuzajuvosovibaset.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/2mu9d8eklkevvdt5ivo71v1kd0/kanezi.pdfIn PDF document text
    • http://xn--49s538bo8ux8c.net/userfiles/file/sujemumetisedodabopoto.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16084d5d6910da---fukodubufesulixaxomisa.pdfIn PDF document text
    • http://gulfcoolcontracting.com/uploads/userfiles/file/file/40587380248.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/cfc093bc5cf79b7a5af6967e969876ed/16991115190.pdfIn PDF document text
    • http://bygreenpure.com/userfiles/file/88612872316.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c594c98b69f---22290084517.pdfIn PDF document text
    • https://questyme.com/userfiles/file/51503042887.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/d5e76a44cf06c8b7874914273df301cc/foledolapovekuviwugipeba.pdfIn PDF document text
    • https://dienlanhhonganh.com/images/pic/file/takudapevasilexekarasusa.pdfIn PDF document text
    • https://leavingcare3plus.ch/userfiles/files/347693583.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607481c430e95---65531083160.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a0b8daf122b---lewujogutatowujijavenapo.pdfIn PDF document text
    • http://vo23.ru/upload/file/48046805619.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160777eea7296e---90313394025.pdfIn PDF document text
    • http://fandimnarodaku.cz/upload/file/bawinunomulurig.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_off00011404.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11404 10736 bytes
SHA-256: 461d727a934036a0cb7546a579189e773d80c94b59c8ae7dab7ff91ff6184e7b
font_01_sfnt_off00012cef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CEF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014501.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14501 17756 bytes
SHA-256: 6e1869b72d9b0820fb1c91ef2d71b393b2970a7073dd84c32ff67fe9e3926049

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