Malicious PDF — malware analysis report

Static analysis result for SHA-256 56373ca088a0913a…

MALICIOUS

PDF

64.0 KB Created: 2021-08-17 06:26:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: e1bda44d995aaaf15f9b27f4f5faa8c7 SHA-1: 010ccf5667be3c419bd647173f11855326a0d3d8 SHA-256: 56373ca088a0913aa6d23fa21fc8b2452e1b94a815ebd2bf6e1f7e8e2d8d4cbc
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress uploads and disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9756

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 http://novichiha.ru/pic/file/zotowepalobiradino.pdf In PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/qt5kh9cbnq7mkr5df4n2vk8cb1/41161574411.pdfIn PDF document text
    • http://bjzjygj.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/61542739589.pdfIn PDF document text
    • http://donkaew-furniture.com/ckfinder/userfiles/files/mexudelegunod.pdfIn PDF document text
    • http://sonarkella.com/userfiles/file/30511805143.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160f666ead9063---jorewizegudilisigilidi.pdfIn PDF document text
    • http://boschvietnam.vn/files/usersfiles/files/rorobatok.pdfIn PDF document text
    • http://brnc85.com/clients/878796/File/toxisekiburonarefitome.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608c7ce44f76e---96732509782.pdfIn PDF document text
    • https://asesoriagade.com/app/webroot/files/files/5277237815.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/dcabb91c37c75b065bb9cd0b8d79f633/sazapet.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fea823288f2---37542534273.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9572101de7---3187127066.pdfIn PDF document text
    • http://rajskiewakacje.pl/userfiles/file/fizaputivilaga.pdfIn PDF document text
    • http://hoteldarim.ir/basefile/hoteldarimir/files/39447388413.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfbd1e7bcad---foteguxisaveto.pdfIn PDF document text
    • https://marathonroller.com/userfiles/files/47272999439.pdfIn PDF document text
    • http://liyangah.com/Upload/file/16195722012.pdfIn PDF document text
    • https://samowar.me/userfiles/files/munufepib.pdfIn PDF document text
    • http://americanpetrochemicals.com/customers/CMS-IMAGES/file/48056293414.pdfIn PDF document text
    • http://crosswaysrecruitment.com/userfiles/file/xilavaxomavatineke.pdfIn PDF document text
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/htgtr2thgfb4m0rjvt8a163qp8/dipilegalotibowar.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=el+camino+del+guerrero+buff+academy+pdfPDF link annotation

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