Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6f6d3769e106d6b…

MALICIOUS

PDF

44.2 KB Created: 2021-10-02 19:53:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 21e70fa36f6fc9b76765632c51409e2d SHA-1: 6041902e0630d60b3c3a76a5f1ebdbca221b92e8 SHA-256: a6f6d3769e106d6b0313656231fc765fef3bbb0f4672648b0791af340d392e36
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ClamAV and an ML classifier, and contains numerous embedded URLs. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a link farm on disposable hosting, suggesting a phishing or spam campaign. The presence of embedded URLs and the link farm heuristic strongly suggest the PDF's purpose is to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7790

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://crewmak.ru/uplcv?utm_term=harry+styles+donating+hair PDF link annotation
    • http://coolbiotech.com/upload/files/vafekatavawitedogaviw.pdfIn PDF document text
    • https://ruxthai.com/ckfinder/userfiles/files/4655075477.pdfIn PDF document text
    • http://eg-connect.com/uploads/editorfiles/file///sedovotabetaraneki.pdfIn PDF document text
    • http://knuhpharm.kr/userfiles/file/20210927044924.pdfIn PDF document text
    • https://sofanet.ro/ckfinder/userfiles/files/busokatekule.pdfIn PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/movarafoguvesepi.pdfIn PDF document text
    • http://zjqzzx.com/uploadfile/file/2021091009040073499.pdfIn PDF document text
    • https://lajovisena.com/gallery/file/beximozikiw.pdfIn PDF document text
    • http://rintoyo.com/userfiles/file/90880627717.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/16140c52f05f6d---64963713282.pdfIn PDF document text
    • https://muahohangnhat.com/app/webroot/uploads/files/33275634673.pdfIn PDF document text
    • http://falerisztika.hu/tmp/54041257242.pdfIn PDF document text
    • http://sasolution.kr/userfiles/file/xanogamegufutadapikesusas.pdfIn PDF document text
    • https://chetanaus.org/bheru/uploadfiles/file/dikevexaligo.pdfIn PDF document text
    • http://casier-a-bouteilles.fr/file/37078092411.pdfIn PDF document text
    • http://aaaexpressheating.com/userfiles/file/86566929774.pdfIn PDF document text
    • http://25630638.kad.tw/kads/ckfinder/userfiles/files/baxesutejojenabobigulote.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f59281fd1f---19938311554.pdfIn PDF document text
    • http://naturenhuman.com/app/webroot/userfiles/file/zipasovowagitoviluxepugat.pdfIn PDF document text
    • http://0225674989.kad.tw/kads/ckfinder/userfiles/files/8251700928.pdfIn PDF document text
    • https://servauto.fr/img/user/file/wodapix.pdfIn PDF document text
    • https://mountainbrookbuilders.com/home/mountain/public_html/ckfinder/userfiles/files/59881829650.pdfIn PDF document text