Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b1f3e987ae16b69…

MALICIOUS

PDF

84.1 KB Created: 2021-09-02 16:46:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 49e1313135342a8368649f7c5992c84a SHA-1: 9103b5992c43fedfc21afd861197eeb71e03951e SHA-256: 2b1f3e987ae16b698f6ebb6b70c2d0925b9620e2ff97ed84be816cfceac82754
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. The file contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The presence of numerous external URIs and link farms indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/b462aa01ada910b84698dfac407b486b/konufamanona.pdf In PDF document text
    • http://factblogs.com/uploaded_files/userfiles/files/90083942053.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/6ad18no7f1ahh7157cnpdq5u00/73096593408.pdfIn PDF document text
    • http://sztarmedia.hu/_user/file/20754426301.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/0972a21a7c801fa114bfbea276d81c67/jokazugenifevuri.pdfIn PDF document text
    • https://nhahangphongcanh.com/uploads/files/47955457741.pdfIn PDF document text
    • http://mauchlineware.com/html/chapelstreet/web/userfiles/files/54774394521.pdfIn PDF document text
    • http://erbamedica.org/userfiles/files/julimato.pdfIn PDF document text
    • https://agermag.ro/mm/file/desojokidowewufixobib.pdfIn PDF document text
    • http://catherine-massage.com/ckfinder/userfiles/files/poletare.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a777e6545fc---16323405033.pdfIn PDF document text
    • http://gr-chem.com/upload/files/99941039230.pdfIn PDF document text
    • http://suaups.net/userfiles/file/36487649086.pdfIn PDF document text
    • https://bedandbreakfastchia.it/userfiles/file/24110450900.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/c4bb510aadf0a1c2f012b04727a21572/12227236351.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072ce9de9346---12418046893.pdfIn PDF document text
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/940e1f670df0a3b3a233fd83bdf6d28f/tegewovabijazasujiz.pdfIn PDF document text
    • http://timebank.ru/sites/default/files/photos/pagefile/70591619484.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c968d1e64a7---fepidefaterut.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/0679a841c97f82faa67d85b9857b638d/kibasetakekenigu.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160711b1e04e0a---tekivaramuxipevo.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/5d30dcaf7a6ac51808b1f87d94f55127/dajatifiwegigukupetudajo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=edda+em+prosa+pdfPDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/9ba76037ad6b9e82f050cf635e702743/rojuwopi.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_off0000dd9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD9F 10304 bytes
SHA-256: 32caa7e21237d9be1203c3aa1a5152364d0f2219de1b884fa55ab5c56abbfa0c
font_01_sfnt_off0000f4ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4CA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010cdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CDC 20880 bytes
SHA-256: 620ff0121a5dbf96d64b9031ae9f05ba5b9084a19bfcaa30daac39349d3a60d7

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