Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ed5fd639240836a…

MALICIOUS

PDF

60.1 KB Created: 2021-08-15 14:41:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: afbacd1d14111c264de67f846324161b SHA-1: adcba5e590c1dae6bcfd1afbddbaf53bd6012d3a SHA-256: 1ed5fd639240836a75e3af8d35c77d63f2ab22e889481890bba835702cbe53dc
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution scheme. Although no scripts were extracted, the PDF structure and numerous external links strongly suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8774

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://herculesestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/87300875780.pdf In PDF document text
    • http://aklond.com/UploadFilesfile///2021070519370234.pdfIn PDF document text
    • http://serdceprirody.ru/userfiles/file/kixaponu.pdfIn PDF document text
    • https://damsindia.org/admin/uploads/file/mipolo.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085ce127f168---26314111667.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160efe866d2bfe---jugowuva.pdfIn PDF document text
    • http://pp-aqua.com/userfiles/files/33447281910.pdfIn PDF document text
    • http://1-cx.com/ckfinder/userfiles/files/puzanixipo.pdfIn PDF document text
    • http://thechelseaff.com/user_uploads/files/zafelezizugoxos.pdfIn PDF document text
    • http://faradbox.pl/files/file/tejemininujutexi.pdfIn PDF document text
    • http://chinhlytailieuluutru.com/media/ftp/file/zinesuvomimegitezigaximo.pdfIn PDF document text
    • https://eternalbliss.net/file/vutiwoxezirisogub.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/219d71f7968df5d4bb08dd71c2a23b55/wazatadiwolasokomowux.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/e9qasdhgi2qv6lhqo04v0gat4l/bejekuni.pdfIn PDF document text
    • http://exmar.it/foto_fck/file/zokafelawib.pdfIn PDF document text
    • http://laihoawedding.com/app/webroot/upload/files/23444856425.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075936db9f6e---34953111544.pdfIn PDF document text
    • http://autoscuolavalerio.it/userfiles/files/35679867454.pdfIn PDF document text
    • http://stjconsulting.it/userfiles/files/xojobavijavi.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16073fa1b2890f---jonevefawidudiv.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c056dbeb728---79371531685.pdfIn PDF document text
    • http://konditsionery-reutov.ru/upload_picture/file/39398778610.pdfIn PDF document text
    • http://vervesimuhub.com/userfiles/file/75043612392.pdfIn PDF document text
    • https://mackbeks.com/files/file/45532192281.pdfIn PDF document text
    • https://geniodelweb.com/file/vekaxakonafu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=el+vals+de+amelie+partitura+piano+pdfPDF link annotation

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