Malicious PDF — malware analysis report

Static analysis result for SHA-256 08e6336370429de0…

MALICIOUS

PDF

83.6 KB Created: 2021-09-21 01:49:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: efdae0460c27b27434147825fb5358df SHA-1: 9b95b47d5bb14ca0f16a217740ac241e289cff29 SHA-256: 08e6336370429de0a7e5161418bc9b7461607229676ebf18fa7b24c360ea3c86
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, some of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to distribute malicious content. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classifier flagging further supports malicious intent. The primary lure appears to be a fake download link for a game, indicating a phishing or malware distribution attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://irlanc.ru/uplcv?utm_term=download+game+brother+in+arms+3 PDF link annotation
    • http://montpellier-business-plan.eu/mbp/upload/images/images/upload/ckfinder/pifijonipo.pdfIn PDF document text
    • https://nsstore.mx/ckeditor/ckfinder/archivossubidos/files/10639761182.pdfIn PDF document text
    • https://mannerfeltdesignteam.se/ckfinder/userfiles/files/vumojajezixeruxuk.pdfIn PDF document text
    • https://congnghieptauthuyvietnam.vn/upload/files/fisumunodozovaxe.pdfIn PDF document text
    • http://gs-metals.com/filespath/files/20210916025836.pdfIn PDF document text
    • http://dekogard.net/deko/veri/_files/gasalimivirepivudoji.pdfIn PDF document text
    • http://dulichtantai.com/files/uploaded/files/54772735602.pdfIn PDF document text
    • https://cobrawire.com/userfiles/files/66723924650.pdfIn PDF document text
    • http://reedxtrainternational.com/uploads/pages/file/10811759080.pdfIn PDF document text
    • http://cbcom.fr/ressource/site-image/files/84179150086.pdfIn PDF document text
    • http://twfbs.com/ckfinder/userfiles/files/gelelulumivepuluwudarenik.pdfIn PDF document text
    • https://technoarc.net/userfiles/file/zapapenokiro.pdfIn PDF document text
    • http://maivietnamesecotati.com/uploads/files/sejubesoz.pdfIn PDF document text
    • http://dedanskecasinoer.dk/userfiles/file/jejowidusixepeweneneb.pdfIn PDF document text
    • http://gospelpour100voix.com/fichiers/newsletter/file/6978350976.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16138ea96a3760---43781071315.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/ta29qeejdeegvt5curbv5umdh5/19362030174.pdfIn PDF document text
    • http://vdavloeren.be/userfiles/files/gunetabijozawunozewujeb.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f7bc3385ab---68368988295.pdfIn PDF document text
    • http://tasarimak.com/ckfinder/userfiles/files/nurajosowolomeriromazi.pdfIn PDF document text
    • https://open-call.fr/uploaded/files/77350360602.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145c66019366---nanusikasoteritov.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/161439bfa17510---wurufakewavon.pdfIn PDF document text
    • http://www.sushmitamukherjee.com/fckimages/file/fenoparu.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_off0000e0ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0EF 17976 bytes
SHA-256: 6848b28122c6f6812f50326787bd8cb980fa4f40105ff0300f6b9eac2d78ff44
font_01_sfnt_off00010f2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F2E 11092 bytes
SHA-256: 59c25cb985d74088db7d40fadc293536c01a1e52cd406335eeb65a0e8da15e13
font_02_sfnt_off000128b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1