Malicious PDF — malware analysis report

Static analysis result for SHA-256 062a97ae7c73fc91…

MALICIOUS

PDF

52.6 KB Created: 2021-09-02 09:53:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e2fac17b07a345a6a6a1328753b9d047 SHA-1: 04d4b983b0497249a94204140c2b8c717cd5f78c SHA-256: 062a97ae7c73fc916bc8acdaf5b2f88ec64762263d3018b92b8d46ea7fae5954
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs pointing to compromised WordPress sites and other domains, indicating a link farm designed to lure users to malicious content. The ClamAV detection and ML classifier strongly suggest a malicious intent, likely phishing or malware distribution. The presence of multiple distinct hosts and the use of UTM parameters in some URLs further support the classification as a link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7573

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 https://laborke.ru/uplcv?utm_term=use+of+trypsin+in+cell+culture PDF link annotation
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160837e7409ffc---wibukilum.pdfIn PDF document text
    • http://arch-teh.com/pic/userfile/82445497919.pdfIn PDF document text
    • https://miet.hu/kepek/60132123715.pdfIn PDF document text
    • http://lt101shop.com/userfiles/files/danupod.pdfIn PDF document text
    • http://upservice.expert/admin/ckfinder/userfiles/files/15034736754.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/frhlq798poitbeu9t2g1amghp7/pogemugobamajazerivilesa.pdfIn PDF document text
    • https://gilbertems.com/videos/file/39808797697.pdfIn PDF document text
    • http://tuecpa.com/file_media/file_image/file/lebefotabeki.pdfIn PDF document text
    • http://salkim.com/userfiles/file/5140130878.pdfIn PDF document text
    • http://honyi.tw/ckfinder/userfiles/file/3280199464.pdfIn PDF document text
    • http://techscreening.com/userfiles/files/fopasudixufapum.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202105/file/pizafi.pdfIn PDF document text
    • http://cariboohose.com/userfiles/file/70611628086.pdfIn PDF document text
    • https://cowichanmusicfestival.com/userfiles/file/49396784815.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/teluvazekemazimevemalit.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c65ac217e70---naxilo.pdfIn PDF document text
    • http://sentezetutmerkezi.com/upload/ckfinder/files/83815197526.pdfIn PDF document text
    • http://muacuoi.vn/Pictures/files/45057323339.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/43754302004.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160850f4fdd935---29026188866.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/7a8ff2a66a390fa1a9042ac289b54a78/23883930979.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/05ijq07h5itviv166udlo60gu6/6656004820.pdfIn PDF document text
    • http://alliance-ltd.com/userfiles/zisowos.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/e1a075e7ae918116af04c88dd6dc8aa6/zewogeruruv.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/ba70pa9jonaops6o57voi66ie1/40650622178.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/baf58f30082565d9bfa2c4d15777f7b0/bugiganarorolomajurowuka.pdfIn PDF document text

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