Malicious PDF — malware analysis report

Static analysis result for SHA-256 da2b7e47f60f105f…

MALICIOUS

PDF

69.2 KB Created: 2021-09-26 08:54:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 916bbd7d5d4bd5b49a53a7a957c63a22 SHA-1: b99a6567f8bb202a9ab8be664e80f812968bad34 SHA-256: da2b7e47f60f105f3f4ffd108c3ac76f6eb85e37b8e2b63e2d89392e0f2c9632
156 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://homestationrealty.com/userfiles/files/tudena.pdf In PDF document text
    • https://pasarangroup1.com/contents/files/wutatorekelakujimaxiwadi.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/21d1fd3c5769d903660438c3815b51b5/puvimenax.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/5b62530c74e3a739959f9efa6e664d14/78734057988.pdfIn PDF document text
    • https://uat-tunisia.com/userfiles/file/zikamalibabigeluzavego.pdfIn PDF document text
    • http://www.primariasantana.ro/uploads/file/53518445419.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16134af569d756---38055678773.pdfIn PDF document text
    • https://calendarsunrooms.com/userfiles/files/zererijanubararofovuxop.pdfIn PDF document text
    • http://propack-th.com/image/upload/File/61800951584.pdfIn PDF document text
    • http://gardena.crazyrockinsushi.com/uploads/files/52287657511.pdfIn PDF document text
    • https://lacausedeslivres.com/userfiles/file/xunosurusukute.pdfIn PDF document text
    • https://equimat-cheval.fr/file/51817890883.pdfIn PDF document text
    • http://busankid.com/webfiles/board/file///20264786798.pdfIn PDF document text
    • http://12shio5.com/contents/files/77017618546.pdfIn PDF document text
    • http://www.catedralirodahaz.hu/data/editorfile/35078715242.pdfIn PDF document text
    • https://olympicwroclaw.pl/zdjecia/fck/file/19291801005.pdfIn PDF document text
    • http://centronegozi.com/public/86343410605.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16147ddb169d0f---78623510844.pdfIn PDF document text
    • http://ninda.vn/userfiles/files/14463589610.pdfIn PDF document text
    • https://toliveinchristjesus.ceosale.catholic.edu.au/application/third_party/ckfinder/userfiles/files/negemadomobalibogexitanod.pdfIn PDF document text
    • https://xpress2.eu/ckfinder/userfiles/files/magugirigixe.pdfIn PDF document text
    • https://www.tocbirsen.org.tr/ckfinder/userfiles/files/56308975153.pdfIn PDF document text
    • https://empresa-venta.hr/files/80241621784.pdfIn PDF document text
    • http://sicilyontable.it/userfiles/files/61593731876.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/438e55fa5673b86d71228d7802d3d358/63551321813.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=dragon+quest+1+iosPDF 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_off0000b09e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB09E 10536 bytes
SHA-256: 39829bdbf0b5a2d1484a83ce5a9618d7de017b772920ffa01a79d3468bbf8965
font_01_sfnt_off0000c885.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC885 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e097.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE097 15804 bytes
SHA-256: 182f3a74cacb18cbfcff306e9dea84c2829017a361e9fbf69e182502f3c17f02

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