Malicious PDF — malware analysis report

Static analysis result for SHA-256 f61ec45047cf0583…

MALICIOUS

PDF

52.6 KB Created: 2021-01-17 12:30:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 655710354b5dccb5071ea0096a5894bc SHA-1: b167704248e925577e99d0e1123b5f60b4f337f6 SHA-256: f61ec45047cf0583aa0075de9b073d770f56902e791b5d86ce607508ea1d0e61
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier indicating maliciousness. It contains numerous embedded URLs, with one pointing to 'trafffe.ru', a domain associated with malicious activity. The PDF structure and embedded links suggest it functions as a lure to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9025

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffe.ru/aws?utm_term=bismillah+calligraphy+vector+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4411717/normal_5fd0f72d6a008.pdfIn PDF document text
    • https://cdn.sqhk.co/busanurutar/1jcvOi2/school_management_system_with_php_open_source_project.pdfIn PDF document text
    • https://cdn.sqhk.co/fasazani/lRgfjdI/vakosedixuneke.pdfIn PDF document text
    • http://vadusulu.iblogger.org/81384915024.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387712/normal_5f904b600be4d.pdfIn PDF document text
    • http://befemuvejizu.22web.org/forest_plot_software_free.pdfIn PDF document text
    • https://cdn.sqhk.co/rosafipex/jbLhaRb/thai_script_font_free.pdfIn PDF document text
    • https://cdn.sqhk.co/loxinesupiva/iigjbjc/vocopro_digital_karaoke_mixer.pdfIn PDF document text
    • https://cdn.sqhk.co/gixejefi/Xii35jm/bosoxuxoz.pdfIn PDF document text
    • https://site-1175852.mozfiles.com/files/1175852/starbucks_drinks_to_try_tiktok.pdfIn PDF document text
    • https://cdn.sqhk.co/ninivaxibab/d1gceTx/15964388501.pdfIn PDF document text
    • https://cdn.sqhk.co/noperizapewo/jCqLMgi/81805042752.pdfIn PDF document text
    • https://site-1168211.mozfiles.com/files/1168211/26409766309.pdfIn PDF document text
    • https://cdn.sqhk.co/rukeditele/giPfjbu/18522433220.pdfIn PDF document text
    • https://site-1185524.mozfiles.com/files/1185524/83331363649.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/wilifafipijifij.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabisura/scanner_apps_for_android_tablet.pdfIn PDF document text
    • http://xedaripa.epizy.com/ada_guidelines_inpatient_diabetes_management.pdfIn PDF document text
    • https://s3.amazonaws.com/fibesezati/jasujezaxi.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/gebemerawabev.pdfIn PDF document text

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