Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f06b6175807d2d2…

MALICIOUS

PDF

73.4 KB Created: 2021-09-02 14:09:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 92bb9e874c2397fe19aa4c8382646438 SHA-1: e60055bf0656b6bef84b3692f9a2c85652e9145a SHA-256: 1f06b6175807d2d237cb250ac629c82f27cd9097187bac71d080e055a21a317e
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external links, many pointing to compromised WordPress sites and disposable hosting. This suggests the document is designed as a link farm to redirect users to malicious content, likely phishing sites or malware downloads. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5631

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 https://kligi.viart.lt/ckfinder/userfiles/files/65394662395.pdf In PDF document text
    • http://mp-journal.com/media/file/39738660231.pdfIn PDF document text
    • https://skyzoan.com/cake/beta/userfiles/file/74759754234.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609dae91bcc0d---9257986694.pdfIn PDF document text
    • http://teakdeck.pl/files/file/zavufowawokam.pdfIn PDF document text
    • http://am-assets.com/aom/magnolia/userfiles/file/17645351560.pdfIn PDF document text
    • http://craftland.de/res/wysiwyg/file/47320100956.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a639a12ac0---74172370953.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/fbdaa36797e1adb550c645381d91840e/59641319287.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/88051334736891218d9c0ecd86a8fa26/52013894291.pdfIn PDF document text
    • http://peeweeslearningcenter.org/clients/5/54/545fcf94abc6bccf175f3035c740e6d3/File/15537414801.pdfIn PDF document text
    • http://coinproject.com/userfiles/image/file/wasudizapujujopivijome.pdfIn PDF document text
    • https://ataru.site/js/ckfinder/userfiles/files/38306511371.pdfIn PDF document text
    • http://www.cenlajobinator.com/siteuploads/editorimg/file/muniwod.pdfIn PDF document text
    • http://firstcuwire.com/file_media/file_image/file/67843111396.pdfIn PDF document text
    • https://glycocalyx.nl/userfiles/image/file/zajidarivajebabari.pdfIn PDF document text
    • https://btsmstlucia.com/atomicsteps/upload/userfiles/file/kezoganukasutalazi.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b751258a3a---raxigexeja.pdfIn PDF document text
    • https://orangerun.re/photo/files/dakapemusubanigini.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/16097e1c0536e4---27140235900.pdfIn PDF document text
    • http://youngthisyear.com/ckfinder/userfiles/files/jimejono.pdfIn PDF document text
    • http://ngor2-3.com/file_media/file_image/file/8901685242.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/480938e8d7ca4031bcde108563a07c84/rerimudiwojasavadokoxago.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=christless+christianity+michael+horton+pdfPDF link annotation

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