Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8338961b99038e6…

MALICIOUS

PDF

144.4 KB Created: 2021-07-17 18:45:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 851178449f197dfb6906f2115569ede9 SHA-1: 70c6b7fcdd164b67ea8d12bbc7e85e42a8f77fc2 SHA-256: a8338961b99038e639f93e065b1af395ee6965fdd0e665b4bc3efd08ccceac15
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload storage, indicating a link farm designed to redirect users to potentially malicious content. The ClamAV detection and ML classifier further support its malicious nature, likely serving as a phishing lure or a distribution point for further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7192

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080bd5822535---74155353853.pdf In PDF document text
    • https://klcmekatronik.com/ckfinder/userfiles/files/90050323070.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/44865564286.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/87403630899.pdfIn PDF document text
    • http://ux-school.ru/files/files/22827530733.pdfIn PDF document text
    • https://kp-bs.ru/upload/files/3404726755.pdfIn PDF document text
    • http://aaz.sk/editor_uploads/files/77792613151.pdfIn PDF document text
    • http://asztalosweb.hu/userfiles/file/96996958023.pdfIn PDF document text
    • https://webtechnocrats.com/upload/file/gadebixifupo.pdfIn PDF document text
    • http://radissonhoteltraining.com/userfiles/file/fidenodenovusafukosoris.pdfIn PDF document text
    • http://alhouti.com/userfiles/file/tafaferadabe.pdfIn PDF document text
    • http://rajskiewakacje.pl/userfiles/file/tebesafugalu.pdfIn PDF document text
    • http://safarang.com/basefile/files/94480613238.pdfIn PDF document text
    • http://sieuthivatlieuhoanthien.com/upload/files/24902612731.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d05edc2b03---wikodifetamokojuf.pdfIn PDF document text
    • https://prospr.fr/ckfinder/userfiles/files/22400428657.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160894372abd40---48652591248.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/f258160598af6fff90a35eaaf3fc5230/fufobu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=consciously+aware+meaningPDF link annotation

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