Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a560009b941ece4…

MALICIOUS

PDF

51.2 KB Created: 2021-09-21 04:46:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a62c0df8f6bbb1238159629ee2ab0a9d SHA-1: 1bc4f1ab2075035bb554b7c17af9e6368004bdcc SHA-256: 2a560009b941ece4bbf0299e0de7b858f6c5b811b2672b9dc594cec46c45b0a6
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs that point to various domains, many of which are associated with compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to potentially harmful content. The presence of these links and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7677

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://smidgel.ru/uplcv?utm_term=similar+app+like+pikashow
    • http://awfiowv.love-mrt.com/upload/files/zivawajigojalivariwuf.pdf
    • http://fthyhs.com/resource/docContentImg/file/2021-09-06/628a92e006e45a8506764cb69a38a662.pdf
    • http://www.dialog-seversk.ru/jsplugins/ckfinder/userfiles/files/92394468184.pdf
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613fa8620632d---bofisufan.pdf
    • http://gewald.ru/content/Files/4891703151.pdf
    • https://hearing-outlet.com/uploads/files/202109011919021253.pdf
    • http://onlinecommerce.bg/uploads/pages/files/gufajitoluletug.pdf
    • http://owop.challengersports.com/ckfinder/userfiles/files/78232726191.pdf
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e7a34595a9---tesininefowotewof.pdf
    • http://lifebeachvilla.com/uploads/image/files/34907471303.pdf
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146f95ba611a---dexitofewu.pdf
    • http://wildpflanzen-planung.de/file/99177576470.pdf
    • https://socardan.com/userfiles/files/31790341259.pdf

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