Malicious PDF — malware analysis report

Static analysis result for SHA-256 46b4bf33a548d9c5…

MALICIOUS

PDF

101.3 KB Created: 2021-07-21 10:09:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: fe5be1ab33a80994a86aee893202ea0c SHA-1: 7acf03f87bd131658035259c051303d599a35d44 SHA-256: 46b4bf33a548d9c50fdfd5576c7314054255deeecd672db893dd3ff58ec95a69
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites and other domains, suggesting it's designed to lead users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a malicious link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 6

  • 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
  • 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://next-engineering.com/userfiles/files/50615544020.pdf In PDF document text
    • http://ktcz.eu/files/files/bodul.pdfIn PDF document text
    • http://allprintusa.com/admin/images/file/mukeveka.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/7d162b2a3864606d9ddd122835b4f595/suzomijumujudum.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091ff9895624---temas.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/c157a0124cad6636ffd1dc1269570a98/86259995456.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/47526885939.pdfIn PDF document text
    • http://deeringbayrealestate.com/userfiles/files/40331923977.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0b2a0a801---542570746.pdfIn PDF document text
    • http://paradisetourkorea.com/FileData/ckfinder/files/20210623_869F233C2EAA84FD.pdfIn PDF document text
    • http://riskhedgetech.com/uploaded/file/25781146960d227d142dd2.pdfIn PDF document text
    • https://www.westcountrystoves.co.uk/wp-content/plugins/super-forms/uploads/php/files/1e33f6e3cdf2d59a5bafd7c9ef58c127/74826332539.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/pj54n34fqgibp74ffei9fqlr1b/64486414658.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160779deeeffe2---12328462804.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c79d80837fc---17606892993.pdfIn PDF document text
    • https://uniqrelation.com/userfiles/file/kuxifavuwexopomogitik.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/d9874cb59f3eda99333edd16a9a83ce0/23043035988.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089dd21d9697---15926646359.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/e971fdb485f44236d730b9af8206adb7/xibisusodet.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/0846f160061f4f6d3f83c32e50ee1c37/3440906566.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608a3b8bec5bb---zetitazositopijit.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16071144946adf---migijokomimadijolorur.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=rul+wedge+resectionPDF 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_off000129f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129F2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00014209.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14209 10616 bytes
SHA-256: 454efd510f5a24eabd12762309bd250ce8d4f50c4ea0494d56d4ffe93fbab913
font_02_sfnt_off00015a3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A3F 17436 bytes
SHA-256: 2b9a3ba80ddcb56e59df6bb44a82e1704020e69c80747e5194279d6bc018ead3

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