Malicious PDF — malware analysis report

Static analysis result for SHA-256 89ac3db421b0e11f…

MALICIOUS

PDF

55.5 KB Created: 2021-06-15 14:06:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: ce1e9a1fbae1313319da0453fb1f1052 SHA-1: 4d85ddf977891036b060b051f7218235d2518511 SHA-256: 89ac3db421b0e11f06b3db22a463e5b0ace31511bc3ba2c1bddc568acfccf115
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or appear to be part of a link farm designed for SEO manipulation. The document body, though heavily obfuscated, contains references to 'gba games download zip', suggesting a lure to trick users into visiting these malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6956

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://queure.ru/uplcv?utm_term=gba+games+download+zip PDF link annotation
    • http://www.doctor-carpet.com/wp-content/plugins/super-forms/uploads/php/files/e9lk1algb6u1tof4vap9d29m84/sixaxesogexepeda.pdfIn PDF document text
    • http://nissanotogovap.net/uploads/images/files/82449984301.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/67745e43f88de713a552adc67106e7c2/surip.pdfIn PDF document text
    • http://ozdoby-betonowe21.pl/Upload/file/50882187153.pdfIn PDF document text
    • http://longarmquiltacademy.net/fckeditor/userfiles/file/domiwipofuvo.pdfIn PDF document text
    • http://zjqzzx.com/uploadfile/file/2021052503465873499.pdfIn PDF document text
    • http://rgn2u.com/userfiles/files/tetoxul.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160947c3288b51---tewam.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089bec55a4d6---bemenijag.pdfIn PDF document text
    • http://kondicionery-vidnoe.ru/upload_picture/file/97119975526.pdfIn PDF document text
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16083aa59d0bd8---43242724156.pdfIn PDF document text
    • http://cuacongtrinh.vn/upload/files/xoziwekabupefuzusaba.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/1609f0764be477---23612790465.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/7dd2308e5a4ec0a045308375009d0b5f/83745444058.pdfIn PDF document text
    • https://sonntag-immobilien.lu/userfiles/files/16584524094.pdfIn PDF document text

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