Malicious PDF — malware analysis report

Static analysis result for SHA-256 96c604af7af2565a…

MALICIOUS

PDF

42.3 KB Created: 2021-08-31 20:23:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 50b6bfded93f8a3c2760062461ae90b8 SHA-1: 0cc5d16777fbf5681de03cb0f52f6f4b96337013 SHA-256: 96c604af7af2565a7215f228c2d566cb3de0c9afc55c14933b0043fcce92d70f
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file exhibits characteristics of a phishing lure, including being image-heavy with minimal text and containing numerous external links. Several heuristics indicate the document is a link farm hosted on potentially compromised or disposable domains, suggesting an attempt to redirect users to malicious sites. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7092

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 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://cructi.ru/uplcv?utm_term=t1+staff+canteen PDF link annotation
    • http://myjobcareer.net/userfiles/file/2021071803343373499.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad3f1239887---zikejinemusafesovuvonom.pdfIn PDF document text
    • https://clinicscrm.com/img/files/futibo.pdfIn PDF document text
    • http://pallenberg-busreisen.de/uploads/files/58342911325.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/a5619e31c80464cf17e8e96f6a7335a6/40185355479.pdfIn PDF document text
    • http://carlaschroyen.com/content_docs/rolebutuz.pdfIn PDF document text
    • http://hykylalumni.org/userfiles/925084380.pdfIn PDF document text
    • http://youngshiny.com/userfiles/file/1623644637.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/27c6366483c2033ab355bc3013478d35/wuzosuxavekuxim.pdfIn PDF document text
    • http://divapharma.com/uploaded/file/92373678255.pdfIn PDF document text
    • http://arniestribu.com/campannas/file/jutososogukon.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f18559efa86---35142922342.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca11d9b651---makepore.pdfIn PDF document text
    • http://ctyrkolky-gamax.cz/data/dokumenty/7456108103.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/6a03fc37514c62be7f705b5cc11b83b8/67955716422.pdfIn PDF document text
    • https://www.nuyew.academy/wp-content/plugins/super-forms/uploads/php/files/ae5952c09057dcb877de0592bc49860b/lutedabujinosu.pdfIn PDF document text
    • http://aristosaigonhotel.vn/uploads/files/lejafejigutowelibikumumeg.pdfIn PDF document text
    • http://kameleonhastanc.hu/files/file/wukeketifoxuzi.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/757e31c3628b8dab613f119bbab60687/55243945655.pdfIn PDF document text
    • http://srilakshmienterprises.net/uploads/bofozokotot.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607525f71aa9c---juwamizenolet.pdfIn PDF document text
    • http://rheinmotel.com/userfiles/file/silotekipunaberijoxate.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/v8sr5kvuquf0e8felivhlbjpt6/xezazufivijijorul.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160741a78e3981---43046236135.pdfIn PDF document text
    • http://majortaylorride.info/images/uploaded/file/27124562204.pdfIn PDF document text

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