Malicious PDF — malware analysis report

Static analysis result for SHA-256 046c6dcee9278a81…

MALICIOUS

PDF

56.8 KB Created: 2021-10-03 16:35:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 4b6943ae173dc60ec7dbaed1bac35ff4 SHA-1: 1efef403153976565ff9c2da258d1f35ea41c2d7 SHA-256: 046c6dcee9278a81536d54f5817edf5125170ff03e625b8387cae7e77c2d9869
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file is identified as a phishing trojan by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs that point to potentially compromised WordPress upload storage and other disposable hosting sites. The primary purpose appears to be directing users to external resources, likely for malicious purposes such as credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7061

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 http://hanstime.com/userData/board/file/40245196031.pdf In PDF document text
    • https://cashcruis.ru/wp-content/plugins/super-forms/uploads/php/files/66f7ab59d37810ee96aa5ea331743b04/39111799737.pdfIn PDF document text
    • https://nayyaralidada.net/alpha/ckfinder/userfiles/files/sunivewamepepofepi.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613a9f88df4c5---25081522153.pdfIn PDF document text
    • http://silarperu.com/UserFiles/file/kamara.pdfIn PDF document text
    • http://nwatchonline.net/userfiles/file/janejeguvamotesiboredapof.pdfIn PDF document text
    • http://pnalog.ru/images/file/fuxibobibataz.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/161503397eccf3---kapodabukawimerog.pdfIn PDF document text
    • http://ferrocom-spb.ru/userfiles/files/rijugakibewetexupena.pdfIn PDF document text
    • http://shijijiaming.net/filespath/files/20210915181959.pdfIn PDF document text
    • http://nikolalepojevic5.com/multimedia/file/nomatizeruzupup.pdfIn PDF document text
    • https://madhubanindiancuisine.com/nbloom/fckuploads/file/19960376481.pdfIn PDF document text
    • https://kiemtoandongnghi.com/public/plugins/ckfinder/userfiles/files/10322262963.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/0416831745.pdfIn PDF document text
    • https://greenfuturevietnam.com/Upload/files/73029088073.pdfIn PDF document text
    • https://villanakarin.com/userfiles/files/42588371585.pdfIn PDF document text
    • http://sherwoodchambergolf.org/ckfinder/userfiles/files/pawazazaroge.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16140f1c51f6e4---rumedakamelanasodege.pdfIn PDF document text
    • https://joinvita.com/neu/userfiles/file/68802263440.pdfIn PDF document text
    • http://sellmysayarah.com/userfiles/files/kugetimerazoledubos.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613417bb425b9---matopodubukagulepuga.pdfIn PDF document text
    • http://smartdeal.pl/files/upload/files/98812002841.pdfIn PDF document text
    • http://arabstina.com/ckfinder/userfiles/files/menugetamomimetusekiwofa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=dua+for+protection+from+bad+thoughtsPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000afa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFA3 11264 bytes
SHA-256: 9ef86a82c6c841e687f154f873378d8e5a6c0f80ab6965f9d369ce0cbe91d2c5

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