Malicious PDF — malware analysis report

Static analysis result for SHA-256 339e30803ddbdddf…

MALICIOUS

PDF

38.1 KB Created: 2021-06-29 13:03:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 60d9a8d0475523f693c4d16d7bf34bcd SHA-1: b4855dad4e65e1a4d19aa40f8eaf66c9b603b8db SHA-256: 339e30803ddbdddf412d49c7d4af63c8577471af762be76b204d5cd9d3a6b10e
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a phishing lure, utilizing an image-based design with clickable links to external URLs. The presence of multiple links pointing to compromised CMS uploads and disposable hosting suggests an attempt to distribute malicious content or redirect users to phishing sites. ClamAV detection and ML classification further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7848

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 38 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://crysiq.ru/uplcv?utm_term=embed+excel+file+in+pdf PDF link annotation
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/0e7bade72803800012076be2ad62bf75/68916588981.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/129ddf2c3c65a69c99f03bd90e0e5186/55527091753.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/16079f9483eb8d---bivax.pdfIn PDF document text
    • https://thai-airpark.com/ckfinder/userfiles/files/64097153701.pdfIn PDF document text
    • http://bielwod.com/userfiles/file/ximup.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/065465cb7d908dda12b872bd07aa5e19/2680131105.pdfIn PDF document text
    • http://18554080.com/userfiles/file/58300463832.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/42399364672.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609dbf7174e46---mexevawinubexagox.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160b14eb8d8624---57437077197.pdfIn PDF document text
    • http://foto-klub.dk/userfiles/file/80754051491.pdfIn PDF document text

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