Malicious PDF — malware analysis report

Static analysis result for SHA-256 98ae9a1cb131a317…

MALICIOUS

PDF

74.8 KB Created: 2021-08-03 13:53:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 67e493b36096aa25860114b3659afdf1 SHA-1: 7f3799d2fbf373881c76d7a57454ce1da000d87a SHA-256: 98ae9a1cb131a317f554986efde3029eaef409e3a4a68442edacd68c3d0645e5
94 Risk Score

Malware Insights

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

This PDF file contains numerous links, many pointing to compromised WordPress upload storage and disposable hosting sites. The ML classifier also flagged this PDF as malicious. The primary attack pattern involves directing users to download further malicious PDF files from these compromised or disposable domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8530

Heuristics 4

  • 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://brnc85.com/clients/878796/File/21213540860.pdf In PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160aa262d4dc04---19194731609.pdfIn PDF document text
    • https://patc.fr/imagesfile/50903441490.pdfIn PDF document text
    • http://gld-lining.com/user_img/files/72047803358.pdfIn PDF document text
    • http://superfishinglewood.com/uploads/files/gobudomobolefilegodito.pdfIn PDF document text
    • http://rjbmachinery.com/d/files/61215807438.pdfIn PDF document text
    • http://sushikyototogo.com/uploads/files/88630949628.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160d1c9fca3ea1---29537057193.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c0614650267---92653592784.pdfIn PDF document text
    • http://erex.hu/upload/file/wadimabeselogafuzokugan.pdfIn PDF document text
    • http://rocb-ap.org/file_media/file_image/file/mexulogunajulexi.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a5641aa862---71258351915.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/08lfh18ama9j81qm2mgfj64n7l/58521840878.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/160a61a50dbbd6---65045972655.pdfIn PDF document text
    • http://ypdtools.com/ckfinder/images_store/files/wuniralobugazab.pdfIn PDF document text
    • http://otvorene-srdce.sk/userfiles/file/zimixetipodoz.pdfIn PDF document text
    • http://stevis.cz/files/file/48377266767.pdfIn PDF document text
    • https://soechi.net/userfiles/file/nokugikikoleju.pdfIn PDF document text
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/4728eeccb24f19a2681c5c5d15b0840c/giroxujital.pdfIn PDF document text
    • http://hoitruyengiaocodocvietnam.com/uploads/image/files/wadepo.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160c478d976b24---futuxaw.pdfIn PDF document text
    • http://studioambienteterritorio.it/userfiles/files/57119400496.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=legal+and+ethical+issues+for+healthcare+professionalsPDF 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_off0000e741.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE741 10956 bytes
SHA-256: 4a6a982176bbfbc801121dd594224cf4ed8759e93c0e4bfa50ae35103bf2e9a7
font_01_sfnt_off0001005b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1005B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.