Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaf78ff89f981592…

MALICIOUS

PDF

40.1 KB Created: 2021-07-14 09:54:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 47daf8d1b702bac7ad14aae824b8caa0 SHA-1: 7bf662f2307918a9df9747fca182ee7fc29ed565 SHA-256: aaf78ff89f981592815b6d9c6684a869698409606efdfa4fbd1d47fcdaab6a0f
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs an image-based lure, presenting a screenshot to trick users into interacting with a hidden action trigger. This action redirects to a URL hosted on a compromised WordPress site, likely to deliver a secondary payload or phish for credentials. The presence of numerous external URIs and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8759

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 40 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 https://allytemp.ru/uplcv?utm_term=invisible+knapsack+by+peggy+mcclintock PDF link annotation
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/26d30be44ca18d7155e0d4402c036a96/54405719258.pdfIn PDF document text
    • http://hzbmsj.net/images/upload/File/3497643075.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079c06a45346---zofazosasixetexofedixiz.pdfIn PDF document text
    • http://sam-global.ch/files/file/neroxoxese.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ac80fbc1d6e---zukeluv.pdfIn PDF document text
    • https://elcoengineeringco.com/userfiles/file/28012041999.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/74evdcrqgthbp79gl9ddh5kqv9/83329195955.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074a42067d24---84273265187.pdfIn PDF document text
    • https://alarrabnews.com/images/content/content/file/84736260052.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/lujabilebe.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083faaad1d9e---88818435842.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607d351d7dfb8---49326442010.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/7bgrhn1pahq9pd6okf15asu2u1/32517981070.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/352b1fce6c49f17a57713d512b14f2b1/topolisujoxogezo.pdfIn PDF document text
    • http://lorofilmes.com/Uploads/ckfinder/userfiles/files/faporodetejonu.pdfIn PDF document text
    • http://booklandbooks.com/userfiles/file/71832397352.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608be8b54cfcc---zalosu.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16070791266ff9---xarejezonavawawanarijusi.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/nucpc568k2In PDF document text

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