Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa574c818a759b69…

MALICIOUS

PDF

53.4 KB Created: 2021-09-05 00:28:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 2d5d9aa122f67970ea17d42fec735dc4 SHA-1: 332a86af748e6ccc3e89264f148900ad9c6f5f2d SHA-256: aa574c818a759b69b7a536699123e6fd97a081110e8351ef97138673195b3436
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a 'Pdf.Phishing.Trojan' signature. Static analysis revealed embedded JavaScript and a significant number of external URIs, many of which point to compromised CMS upload directories or appear to be part of a link farm on disposable hosting. These elements suggest the PDF is designed to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4394

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://carszana.com/image/upload/File/genopedosironakigepirov.pdf In PDF document text
    • https://vico-real-estate.com/ckfinder/userfiles/files/pexamofasoro.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/16074d9859c518---11224113538.pdfIn PDF document text
    • https://fivetc.net/uploads/files/74207039163.pdfIn PDF document text
    • https://betenagro.com/sites/default/files/file/zejifizil.pdfIn PDF document text
    • http://caramelitos.sk/files/16387467401.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/9vgu6nib37olormhrotclu2t87/96063837737.pdfIn PDF document text
    • https://apaman.ti-am.jp/js/ckfinder/userfiles/files/93656191036.pdfIn PDF document text
    • https://indianhairtransplant.com/ckfinder/userfiles/files/tevebuwofodaranozubawukaw.pdfIn PDF document text
    • https://stayinbranson.com/ckfinder/triplebuserfiles/file/55707811856.pdfIn PDF document text
    • https://daaeportrett.no/upload/file/24767608890.pdfIn PDF document text
    • http://ccspevents.com/clients/24998/File/ravafifetadetiwenurik.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/0dfcfd59697fffa1c6d3a9f62a84f935/53973378727.pdfIn PDF document text
    • https://silga.ca/userfiles/file/94091649975.pdfIn PDF document text
    • http://shiinamotors.com/js/upload/files/38946473059.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/ebc785c9979877dac9cd08f993aa824c/72357384620.pdfIn PDF document text
    • https://fokusmedia.com/images/uploads/zefonokixofabogodojugaxu.pdfIn PDF document text
    • http://neenah1976.com/clients/17995/File/zefewalapafobawuno.pdfIn PDF document text
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/fe4da2ead31bafd8da9b8b635f13110f/jurizuvexeteniviwejizo.pdfIn PDF document text
    • http://poketomecam.com/uploads/files/goxopopokodiwejetibuta.pdfIn PDF document text
    • http://bluebiz.kr/userData/board/file/vimitug.pdfIn PDF document text
    • https://1877painters.com/FCKeditor/file/zefakixezolujiwijifojewon.pdfIn PDF document text
    • http://rebizplus.com/userfiles/file/noligobujipujijuxizafu.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/16072b0709deae---38973999584.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=christian+soteriology+pdfPDF link annotation

Related samples 8

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