Malicious PDF — malware analysis report

Static analysis result for SHA-256 6bab8e8dfca1f09f…

MALICIOUS

PDF

69.9 KB Created: 2021-09-06 20:12:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 012d5606618484fa1e0ca7597e689c87 SHA-1: f901f16ab64c718516d2dcd0afb33e728dfd13f6 SHA-256: 6bab8e8dfca1f09f8a564b9cb4503c1e883013ea50b81de8d691f3052907de0b
124 Risk Score

Malware Insights

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

The PDF file contains a link farm designed to direct users to external websites, with several links pointing to compromised CMS upload directories. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The primary attack pattern involves luring users to potentially malicious or compromised sites through embedded links.

Machine Learning

  • Nyx PDF Classifier clean score 0.2445

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.
  • 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://nstyapi.com/resimler/files/8969087166.pdf In PDF document text
    • https://chambres-a-la-ferme-plouzelambre.fr/userfiles/file/61943453291.pdfIn PDF document text
    • http://ya-ke.cn/admin/upload/7756815160.pdfIn PDF document text
    • https://starfoil-mail.nl/uploads/wysiwyg/mafasinutozitojuzeraf.pdfIn PDF document text
    • http://sinsg.com/files/fckeditor/file/wujopufiziwiteluregub.pdfIn PDF document text
    • http://qualityfirstservices.pro/testingsites/advantage_aviation/assets/media/file/pomaneriraginawijajo.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/ifofgcavc0rvc1h6etha7rbm7f/sibixunol.pdfIn PDF document text
    • https://shian-jin.com/UserFiles/files/14908185296.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/dccab0da85454cf7baa4125fa9f419e5/78245066126.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/m52bl72tu7ie0bt3vcnd2ac4c4/39253579179.pdfIn PDF document text
    • http://geredekombiservisi.com/userfiles/file/birixosakipo.pdfIn PDF document text
    • http://yossy.biz/userfiles/file/99041875434.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/260423154533.pdfIn PDF document text
    • http://cssh.es/img/file/tumumumazuxiwu.pdfIn PDF document text
    • https://stoneappeal.in/FCKeditor/file/mulobumegikopereliferoso.pdfIn PDF document text
    • http://richardarnoldalumni.com/clients/a/ad/ad1dcfa6f69ac51e3fe6bec18f6cf6d6/File/xadefoto.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/1609e74364c917---lepevubibisaras.pdfIn PDF document text
    • http://augsburger-dartliga.de/uploads/file/nusajole.pdfIn PDF document text
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/886565c1872642650e594e3fddb75dda/67909797917.pdfIn PDF document text
    • https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/7e3ed270df25aab7f07b8f4074fc5d1b/40666503573.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd3398b0ae3---junapidixef.pdfIn PDF document text
    • https://cs168.tw/upfiles/editor/files/vewuwokaledexuzijozasu.pdfIn PDF document text
    • https://cosmeticdermatologymiamibeach.com/uploads/data/files/47864812876.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/16096756dc1725---15316240483.pdfIn PDF document text
    • http://mientrungland.net/uploads/image/files/60050472110.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/xirowamupile.pdfIn PDF document text
    • https://oncallanatomist.org/ckfinder/userfiles/files/dipig.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=elkay+lzs8wslp+pdfPDF link annotation
    • 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_off0000c6fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6FC 16304 bytes
SHA-256: a01e62e46fc89c3d346c6fd209a5025a5709a2823169f6846a06fe82e48b8dd6
font_01_sfnt_off0000f139.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF139 10388 bytes
SHA-256: 9c8903fcf4342ecff47d95b218d74e5b379a72af7e948ec63d03e48726d1b35f