Malicious PDF — malware analysis report

Static analysis result for SHA-256 653da6223bbe2d1e…

MALICIOUS

PDF

98.2 KB Created: 2021-08-10 10:17:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2077645d9322d4da253751b3e9d866ae SHA-1: bcc46544b69045439fae90b6cb0879536cfd0681 SHA-256: 653da6223bbe2d1e0d0f65281b38079648441a295e046e1f60f2a2ed376a5b4c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and an ML classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious content. The document body was unreadable, but the presence of numerous external URLs strongly indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 http://abovomedia.hu/_user/file/vorutanirurewosuromar.pdf In PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b911a89603c---xajowijil.pdfIn PDF document text
    • https://audit-advisers.com/userfiles/file/57440660697.pdfIn PDF document text
    • http://hanilkwanla.com/uploads/files/sumegilemizatajam.pdfIn PDF document text
    • http://cokhisah.com/webroot/img/files/78207848636.pdfIn PDF document text
    • https://qpshouse.com/upload/image/file/35364921028.pdfIn PDF document text
    • http://dvg.asia/ckfinder/uploadfiles/files/62977082602.pdfIn PDF document text
    • http://edwardlankin.com/clients/86087/File/35755292394.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/3934f124b0ae97604f34cd52a686f965/78911105457.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16092905cf2a55---nejunuraponutirapiwogod.pdfIn PDF document text
    • https://www.northwoodmedical.ca/wp-content/plugins/super-forms/uploads/php/files/v5sdcsa663rujdt2k3osebf69b/43351344732.pdfIn PDF document text
    • http://maryalo.com/userData/board/file/57875398109.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a2c2b6b6ac7---parubewosemotizosejugu.pdfIn PDF document text
    • http://dansecyr.ca/pdf/file/65505723175.pdfIn PDF document text
    • http://3sdent.com/upload/files/jawefezanurenisazimesar.pdfIn PDF document text
    • http://cupta.org/userfiles/files/20210529001502.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/03d6a6551a51fa3210a9c8202bb20532/rawupunerejononoseb.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/6a9hr10ad5kfcd51gref03lh0a/24966858989.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160985c1bea31b---pamodu.pdfIn PDF document text
    • http://colescastle.com/clients/875019/File/kafuviwugu.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b07211d653---kaganisir.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/4639626b30184cd95500f8dc082ac247/gonagus.pdfIn PDF document text
    • https://elearning-chemistry.ro/userfiles/file/pidowutabenusew.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608659727c18f---88023739966.pdfIn PDF document text
    • https://bustotoronto.com/userfiles/file/mufamidadilototozexor.pdfIn PDF document text
    • http://yjsyrj.com/userfiles/file/20011495190.pdfIn PDF document text
    • https://ita.kru.ac.th/ckfinder/userfiles/files/zeravob.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/415f135e82e760978916cacd30b22f38/31756887745.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=what+does+foxtrot+charlie+meanPDF link annotation
    • 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_off00011b8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B8D 17608 bytes
SHA-256: f2a035edf56f3df5a2a0b170e225a05607f84a99e96961bae9392d8c3239d0fa
font_01_sfnt_off000149e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149E0 10836 bytes
SHA-256: 06ea1148df564f79c729b624e63a1fcefa88737959e280d7b4e1799c903733d5
font_02_sfnt_off000162bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x162BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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