Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ab9d84807ce46ed…

MALICIOUS

PDF

92.3 KB Created: 2021-08-07 15:46:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 03ddbe0cacce45ca4e8fdf22c7b3fe29 SHA-1: 013e898ecf3996026ee9e4ae2f6b4ff44fa44b44 SHA-256: 4ab9d84807ce46ed871370de3a13d70681cdbd16ac1c453fac8a30c87eb525d5
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan. It contains numerous embedded URLs, many of which point to compromised CMS uploads and disposable hosting, indicating a link farm designed to redirect users. The PDF structure and embedded links suggest a phishing or redirection attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4971

Heuristics 5

  • 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
  • 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://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/b4210e78b1e12016b6a1b053985bebb7/geladezigom.pdf In PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/b580c371a3043489b66d45e5e009b3af/venodezigat.pdfIn PDF document text
    • https://consurs.ro/ckfinder/userfiles/files/weponobitifotum.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076f1f6ec5e4---tasomimetu.pdfIn PDF document text
    • http://drairtools.com/ckfinder/userfiles/files/35254453372.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c40738376ab---rubobedijebevixapodukamu.pdfIn PDF document text
    • https://roomart.uz/ckfinder/userfiles/files/6798972482.pdfIn PDF document text
    • http://kfnmdg.com/upfolder/e/files/20210603093713.pdfIn PDF document text
    • http://timavoshipsupply.it/userfiles/file/36226981619.pdfIn PDF document text
    • http://musicpark-live.de/userfiles/file/vilolamunivukadojeru.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608d17e2a8fe1---jetepirojo.pdfIn PDF document text
    • http://someteme.com/archivos/_20210628090317.pdfIn PDF document text
    • https://lamaisonducoeur.ca/upload/editor/file/rozotojefojimubajuwasomi.pdfIn PDF document text
    • https://grup-insaat.com/userfiles/file/521450979.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/64a02ca590db23a4a5123fe173927d7b/22206312093.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/45on1am5rt3onkbibpfbsk8cal/kujeferevuvexatowibu.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610b71c03312a---dagogidibekebuvabiwug.pdfIn PDF document text
    • http://atallmed.com/userfiles/files/zanideguxejowagor.pdfIn PDF document text
    • http://springhs1988.com/clients/a/a7/a70db2535ed58991dd9724faf9b165d0/File/59256234315.pdfIn PDF document text
    • http://keralabiblesociety.com/fck_uploads/file/suzuduf.pdfIn PDF document text
    • http://101-games.ru/images/uploads/files/jozobe.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070a32189c2f---83405857691.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=drown+junot+diaz+fiesta+1980+summaryPDF link annotation
    • http://crossfit28.com.s125853.gridserver.com/siteuploads/editorimg/file/37701377742.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011ac9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AC9 16796 bytes
SHA-256: 056f981dfa30ef686c3d76d876710dcee2a1666cf9bc00f6a161829161cfaa64
font_01_sfnt_off00014661.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14661 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1