Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e08bd13d3d31d30…

MALICIOUS

PDF

95.5 KB Created: 2021-07-01 11:29:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 6bff0808ecbd3d7b166d3186be9354da SHA-1: 8cd03b74d11bd25e059f9dbfebce3db17660891e SHA-256: 2e08bd13d3d31d30927f16e50d9b22cac28b9d7c34763726322e8a18aa46522d
156 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and link farm heuristics, indicating its primary purpose is to redirect users to external websites. Several of these links point to compromised WordPress upload storage, suggesting a phishing or malware distribution scheme. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9918

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://cructi.ru/uplcv?utm_term=pok%C3%A9mon+black+and+white+rom+download PDF link annotation
    • http://karthikeyanjayaram.com/userfiles/file/66962460295.pdfIn PDF document text
    • https://binarbaidequipment.com/public_html/userfiles/file/suzepawudewurilot.pdfIn PDF document text
    • http://oilandgaswork.com/userfiles/file/7146026008.pdfIn PDF document text
    • http://seoulgreeter.com/userData/board/file/92600458272.pdfIn PDF document text
    • https://newtech-utm.pl/userfiles/file/fesivoduxewozax.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/1114899856d711233fe25509a61e8b80/12654460595.pdfIn PDF document text
    • https://hgb.se/filer/file/61222880983.pdfIn PDF document text
    • http://duda-tech.pl/dudatech/upload/file/genoliwiluwugerifapinuwon.pdfIn PDF document text
    • http://crystalsteakandstogie.com/clients/1/1d/1dbb6d5698303b6304ae84622e226a19/File/22680701428.pdfIn PDF document text
    • http://zimmerei-possert.at/14203429721.pdfIn PDF document text
    • https://angelsstaff.com/uploads/file/zutenasuserakuvejuvikax.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160aaabce623c3---83067607536.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/uvtm6eoeb2v2b537e30ck24hq5/21817923340.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090d4da43707---dopigimim.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/ca4ba360845ba7de7c496e863f18dcec/64042074712.pdfIn PDF document text
    • http://cloverpark1959.com/clients/51168/File/puxugakoju.pdfIn PDF document text
    • http://inezorviskids.com/clients/37546/File/23898217594.pdfIn PDF document text
    • http://closehorses.com/userfiles/file/31360490801.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/a2ac371772e16f79fcee2c840acce6ed/vusapatox.pdfIn PDF document text
    • http://renovator.cz/files/file/92267645030.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/16078d09da7e98---17714371176.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dc752b2801f---sugopudede.pdfIn PDF document text
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/24f2c6489f00d3478f86a09226fcc6bd/dazaluwizabega.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607c8f7143ca2---nofasuwaripadepezof.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C9 10940 bytes
SHA-256: c718a217f55bf73674f40f1de1bec27134e248e43d9696e1b87f6c6d4efbf151
font_01_sfnt_off00010fa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FA5 3120 bytes
SHA-256: 63d5329265fa66f31317675e0fa273fb9e7ad5c9525a3d6739324c30c534e186
font_02_sfnt_off00011c6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C6E 26580 bytes
SHA-256: 8e7b74edcdb31a8357751a2883637d7d1e483b98d92b488487c0017412559ec7
font_03_sfnt_off0001558f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1558F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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