Malicious PDF — malware analysis report

Static analysis result for SHA-256 93728f18bb8da29f…

MALICIOUS

PDF

49.8 KB Created: 2021-06-22 21:55:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: b0327b826004e300121a1d79dc3118aa SHA-1: f6c7f9462bc1989986bcb4c49b1ee31c354b2c52 SHA-256: 93728f18bb8da29fbdb8515aac75cbe5e416a8044d9590dbd1d54a32737c32a8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to compromised WordPress sites, suggesting an attempt to distribute malicious files under the guise of free ebook downloads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to host and deliver second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7936

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://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b66797dbf94---11210421908.pdf In PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a3ae8e19a9f---37187774925.pdfIn PDF document text
    • http://mobilesamara.com/img/files/file/dukob.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/63481688988.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4da49de00b---rofusetifoxo.pdfIn PDF document text
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/712defd67cce71c221b2cab16aa34989/7801209858.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a871c0d826f---metim.pdfIn PDF document text
    • http://amdind.com/userfiles/file/13838485205.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c9664a84631---nesuwigu.pdfIn PDF document text
    • https://majorsagilekvaros.hu/uploads/file/76515030772.pdfIn PDF document text
    • https://transport-vehicules.fr/userfiles/file/jukuf.pdfIn PDF document text
    • https://cakenepal.com/userfiles/file/83791997790.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160a169d17e789---45653610559.pdfIn PDF document text
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/l78ve3b6gnvanp00q87nrrrfj4/kebozuzujopegaramixax.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160721d8010dc6---pavijexewola.pdfIn PDF document text
    • http://beateromer.com/bilder/file/55341948320.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e21f271492---2526011404.pdfIn PDF document text
    • https://anjingliar2.com/contents//files/25352540.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1f7143c2b3---rinaganetinosoben.pdfIn PDF document text
    • http://tubietelbar.hu/uploadfile/46998681559.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=twilight+pdf+free+download+of+ebookPDF link annotation

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