Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e6b8a16f6ab43a1…

MALICIOUS

PDF

198.3 KB Created: 2021-08-23 12:56:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 4170025a2f032342082004f1be2df437 SHA-1: 9a74a2e1bb071f8969a0329e2d42c05d0e58f6ad SHA-256: 0e6b8a16f6ab43a1664c2931ea169a72ff914593616c435ab1930622d7b2aff9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to compromised WordPress upload directories, indicating an attempt to host malicious files. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9819

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://laflammerouge.ch/userfiles/files/palita.pdf In PDF document text
    • https://art-eria.pl/mandarynka/pliki/files/zuwali.pdfIn PDF document text
    • http://olsztyntransportmedyczny.pl/userfiles/file/tufirumisolazagemuwokola.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba7c39d907f---76624617681.pdfIn PDF document text
    • http://drairtools.com/ckfinder/userfiles/files/bepenegivazutor.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce803dc38d---26414321603.pdfIn PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/16090d3299823e---gogupusuguxevagikupozimit.pdfIn PDF document text
    • https://ski-experience-japan.com/images/blog//file/xazuzawi.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/oge5iemtur3ud2t7v0n6pljde2/25357387507.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1b0633b2e4---tavefadogifikizejulot.pdfIn PDF document text
    • http://glamour-nsk.ru/ckfinder/userfiles/files/78369780358.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/0nrbdi56gg7f69pqjpmuht6kjn/fetanawujawutu.pdfIn PDF document text
    • http://sciattella.net/images/file/lujivubawafila.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b2e1f8a0b78---54715004253.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbd452d2b42---86633563592.pdfIn PDF document text
    • https://galerie-louise.be/userfiles/files/debuju.pdfIn PDF document text
    • http://techniq.ae/admin/uploadfiles/file/kadixinup.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4b4b889a7f---31075299717.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2acb74f22b---35548964123.pdfIn PDF document text
    • http://jouezadomicile.org/clients/4/49/49939bf6a151252ba1adfe53d1befa29/File/4816803669.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160e613655a328---tinivivelebipozawu.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/6389017608ee0928d297cc5ec3d1ab48/74372536085.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/1183e1dfde864700984b0946c07055fe/51996732023.pdfIn PDF document text
    • http://veiligheidssloten.nl/ckfinder/userfiles/files/pamotesusekobepukezano.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=710+woodcrest+way+forney+txPDF 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_off0002aad3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AAD3 17888 bytes
SHA-256: e9167a0675e0208289e8b404f5e005f6951fa0b578ada02162d6c76bb438a040
font_01_sfnt_off0002da16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DA16 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0002f22d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F22D 10760 bytes
SHA-256: bf6704b7daa04282304309727610ab2eb1f2140961d4b6cd03073cffb11d3004

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