Malicious PDF — malware analysis report

Static analysis result for SHA-256 64598bf3d8777eaa…

MALICIOUS

PDF

110.6 KB Created: 2021-08-08 03:45:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 31d1f2a9ebb25d2615408f317100bad8 SHA-1: ee44c77c891062c61aa2625a86bdb15094cd7707 SHA-256: 64598bf3d8777eaa277df3e76b2a0b65ea362bd00e3c4c1bce2117fc6cb227d1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous external links, many pointing to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt, likely leveraging a spearphishing attachment vector. No scripts were extracted, but the overall structure points to a malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9465

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://nomylo.ru/uplcv?utm_term=fichas+para+imprimir+verbo+to+be PDF link annotation
    • https://ajwatravel.com/wheelmarine/userfiles/file/buwasesoju.pdfIn PDF document text
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/94b7cac46c72c6f58c4a8454c375a1f7/vusafi.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/5392315245a8bd29b2bd764c4ba6a26b/nuwulubotunoj.pdfIn PDF document text
    • http://diamantina-joaillerie.com/ckfinder/userfiles/files/98535523735.pdfIn PDF document text
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/44a65daae7fadca3a5ecc2c24542b80d/81340750472.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a5034b55767---wezezunevugitumezav.pdfIn PDF document text
    • http://winteringlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/86929393627.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a6469d5924a---28736916780.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c469f9d2316---suwekarovibegerul.pdfIn PDF document text
    • http://cncforginghammer.com/d/files/masaseziwinedope.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/966bf0bfaa8ed1b70c2644420fc438d7/3473622920.pdfIn PDF document text
    • http://eclickapps.in/userfiles/files/kulokeru.pdfIn PDF document text
    • https://nada70.org/userfiles/file/41156306643.pdfIn PDF document text
    • https://dadesigning.com/daduserfiles/files/fatuxamileresolesu.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607e33be86920---99005010820.pdfIn PDF document text
    • http://eptesteplelek.com/uploads/file/xofilusib.pdfIn PDF document text
    • http://bukvoznaika.ru/ckfinder/userfiles/files/14189791055.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/706c742d1ac582511b88984108bca485/19437640677.pdfIn PDF document text
    • http://inter-travel.hu/_user/file/vefebizitutedavoniba.pdfIn PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/27f7c329a10daaf62cfffb3b5e964aac/74974691455.pdfIn PDF document text
    • http://augsburger-dartliga.de/uploads/file/76098472086.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/9200ed3c067e038beeb0968121306e21/kabodituselatide.pdfIn PDF document text
    • http://www.hydro-tg.pro/upload/file/jurefuxomaxefojape.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f1deed30ba---pugafepu.pdfIn PDF document text
    • http://daiwavn.com/uploads/image/files/25225713918.pdfIn PDF document text
    • http://beachfirebrands.com/userfiles/file/9687690670.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000116ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116EC 10672 bytes
SHA-256: bc19212cf6adb6b961fd96b3ce6ae57853054d7ba793408231c8cbe4390541d3
font_01_sfnt_off00012f35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F35 24824 bytes
SHA-256: a6d51e52d0c8e9cd1636548603b63f742707c96b4ed325aadc70842c22e15c38
font_02_sfnt_off00016fa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16FA1 1904 bytes
SHA-256: 78626771e6a27b38652c47101928e0c7db3704f08b099a68dd44aab984a93aea
font_03_sfnt_off0001787b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1787B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off0001908c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1908C 16760 bytes
SHA-256: 8061fceac36dae9a65a975b7058140348afa6a4255d64d5fb1af9ac18d65e5fc

Open this report in the interactive analyzer, or submit your own file for analysis.