Malicious PDF — malware analysis report

Static analysis result for SHA-256 abc1a745a36e3056…

MALICIOUS

PDF

62.5 KB Created: 2021-08-04 22:00:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 9ccf15e757074f4987c7c00498952738 SHA-1: f13e7cb7a44635eac49cb1d891152eb1076acc42 SHA-256: abc1a745a36e3056f8cc1d3a2bd8c2c2c7e63d95cccc41a713cc85f56d5a4cf2
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript, indicating an attempt to execute malicious code upon opening. The document also features a link farm pointing to compromised WordPress upload storage, suggesting a lure to download further payloads. The ClamAV detection and ML classifier further support its malicious nature, likely as a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6676

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1bead7143---tesenamekifow.pdf In PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160d6adf8072f8---bedojifapaxatowivivabek.pdfIn PDF document text
    • https://dunakanyarfesto.hu/ckfinder/userfiles/files/jekebiwovom.pdfIn PDF document text
    • http://abw10thstreetne.com/uploads/files/pasog.pdfIn PDF document text
    • http://skonasystems.com/userfiles/file/jibaxavugojixip.pdfIn PDF document text
    • http://arserwood.com/js/fckeditor/editor/filemanager/connectors/php/connector.php/upfiles/file/210510052931505333tv4nwu.pdfIn PDF document text
    • https://batikatravels.com/userfiles/file/77228181523.pdfIn PDF document text
    • http://playbabydoll.com/userfiles/file/mabifurur.pdfIn PDF document text
    • https://kozhikodedeaf.org/admin/my_files/file/32625567306.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160d39744df417---xonifabitafilijano.pdfIn PDF document text
    • http://museeducuir.org/upload/files/33033988406.pdfIn PDF document text
    • https://roofmed.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160aa186614a2e---78679520464.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=architecture+portfolio+template+pdfPDF link annotation

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