Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa32a74819fe6734…

MALICIOUS

PDF

54.0 KB Created: 2021-10-05 02:23:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 9b1dee8a3d19ef585aefe3aae5b18469 SHA-1: 247938d1c25a09b5f20aebcba9ef4cb993b1b8e2 SHA-256: aa32a74819fe673497cdcfab92f9a2ea8638d91674ee8083d89150edbaaa70c7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains multiple links to external websites, many of which are hosted on disposable domains or compromised CMS uploads, suggesting a link farm or phishing lure. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics indicates a pattern of using such sites to distribute malicious content or redirect users. No scripts were extracted, but the overall structure points to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6438

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://phanvienphianam.com/uploads/userfiles/file/gekikagulijadato.pdf In PDF document text
    • https://fundacionamigosdelmarcaribe.ong/ckfinder/userfiles/files/zegivojarovegokuxe.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/16154288d1d6ae---tabubokuzasevarunax.pdfIn PDF document text
    • https://mimpishio2.com/contents/files/webaxaripusajeziduvezoba.pdfIn PDF document text
    • http://usaoxin.com/userfiles/2021-9/file/xosizunusisopebujoxe.pdfIn PDF document text
    • http://rsport.eu/yonexshop/static/file/sikujolatezatagakofe.pdfIn PDF document text
    • http://fioredda.com/userfiles/files/lifuxipelivufak.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613880868c4f7---kafabimali.pdfIn PDF document text
    • https://hagakure.by/upload/editor/files/karevofozalufajigunudoro.pdfIn PDF document text
    • http://massvt.sk/editor_uploads/system/files/95255904061.pdfIn PDF document text
    • http://sentidoseg.com/resources/original/file/talekud.pdfIn PDF document text
    • http://area100impianti.it/userfiles/files/90689675705.pdfIn PDF document text
    • http://travelcenterpuntos.com/campannas/file/78149458843.pdfIn PDF document text
    • http://smcertificationservices.com/userfiles/files/51738208080.pdfIn PDF document text
    • https://forssah.co/userfiles/file/23140178073.pdfIn PDF document text
    • http://asvpp.fr/pdf/62871764947.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/76041001650.pdfIn PDF document text
    • http://moscowballet.ru/userfiles/file/27455694948.pdfIn PDF document text
    • http://holzbau-napetschnig.at/xeroguzonatutamupinife.pdfIn PDF document text
    • http://fqcycpa.com/jingkelun/userfiles/files/20210902174929.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/db45f08843761f636ed8bd1be923a7dd/78018397829.pdfIn PDF document text
    • http://studiogaleazzo.eu/userfiles/files/nixolinav.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615b87d713177---gexadanamiparixadumu.pdfIn PDF document text
    • https://nhuadailoan.vn/upload/userfiles/files/rubugusibomuwafunug.pdfIn PDF document text
    • http://tischlerei-schlusche.de/sites/default/files/file/rijijaxamuwusinakolemanid.pdfIn PDF document text
    • https://www.alapan.org/fckimages/file/nawexotufimaji.pdfIn PDF document text
    • http://alacarte-husum.de/userfiles/file/47794645094.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=how+to+print+one+pdf+on+multiple+pagesPDF link annotation

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