Malicious PDF — malware analysis report

Static analysis result for SHA-256 609505cb5885a553…

MALICIOUS

PDF

42.7 KB Created: 2021-09-01 11:16:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: e8d9b8b848edb0860addef727ac86303 SHA-1: 23be4393f4611842828e9be30e229db548f3159c SHA-256: 609505cb5885a5538f8020c6d45530a55c21dc27139e83308b57944e6bf3a5ab
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its small size and image-heavy content, designed to trick users into clicking embedded links. Multiple heuristics indicate the document functions as a link farm, pointing to various compromised websites and disposable hosting. The presence of embedded URLs and the overall structure strongly suggest an attempt to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7281

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 42 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://philabc.ru/uplcv?utm_term=darkness+rises+unlimited+gems PDF link annotation
    • http://dralituncer.net/userfiles/file/xonavegidikajobizivu.pdfIn PDF document text
    • http://teenaramainc.org/clients/875997/File/45619951098.pdfIn PDF document text
    • https://stehovani-ostrava.cz/static_pages_files/file/gikuxalamam.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a869aa4e58e---latujekonegasuxezumine.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/ms132686ege1j68mnu9jsgi1mc/66241906317.pdfIn PDF document text
    • http://whkmradio.com/userfiles/file/somasuxudifekisa.pdfIn PDF document text
    • https://atkarisuli.hu/userfiles/file/16413255314.pdfIn PDF document text
    • https://bobecoingatlan.com/uploads/editor/file/tavakenulotojojituju.pdfIn PDF document text
    • http://proxima-design.cz/files/file/75076824977.pdfIn PDF document text
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/lleeopc1p4rgjv4orsb7qvausj/78854457046.pdfIn PDF document text
    • http://maxidmum.com/images/upload/fck/file/97163938737.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/718bfc7d6e3d897d8c1590d126891c8b/13013667981.pdfIn PDF document text
    • https://fetogram.com/images/upload/files/62695689263.pdfIn PDF document text
    • https://foxtailmag.net/wp-content/plugins/super-forms/uploads/php/files/544d32cd6c3da1baac02a4c48bbd4637/3174291088.pdfIn PDF document text
    • http://fuzoku-kyujin.jp/ckfinder/userfiles/files/zutopuzowo.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d987ccc82d6---981214946.pdfIn PDF document text
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/f0b3569a7fac4cb6bd5289076dee562c/1531691018.pdfIn PDF document text
    • http://icsbc.ru/fuploader/file/46194623163.pdfIn PDF document text
    • http://thehonourride.ca/clients/c/c2/c2a221447f3e921143a55eca482c8289/File/77911981357.pdfIn PDF document text
    • http://shield-in.com/userfiles/files/82252560197.pdfIn PDF document text
    • https://arendic.cl/files/44424399404.pdfIn PDF document text
    • http://arch-teh.com/pic/userfile/luluvowuvilinakirunirow.pdfIn PDF document text

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