Malicious PDF — malware analysis report

Static analysis result for SHA-256 f022cab386b9cb00…

MALICIOUS

PDF

123.5 KB Created: 2021-08-07 04:49:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 17ae01e360c07fc46d56cfec6313827d SHA-1: 0f95e972430023bef9a9db1ac5b96ddff4e1daf7 SHA-256: f022cab386b9cb009822b0d2bd823de15def99115fc4588c55809b3430a0dc03
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites and disposable hosting, indicating a link farm designed for phishing or malware distribution. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or trojan delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8733

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://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/ff6d8eb8c0edd627300a914e31ddef7c/katusowevova.pdf In PDF document text
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/0ig1ua3ca8k8t69u0bqc52r9gt/vetezifexoliz.pdfIn PDF document text
    • http://luisacortesearchitetto.it/userfiles/files/zenatakevuj.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608537ee29b5f---47716621635.pdfIn PDF document text
    • http://kameleonhastanc.hu/files/file/61488522963.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16077f0dd0c964---laxetipugudirafoku.pdfIn PDF document text
    • http://cerezolorente.com/files/cerezolorente/_repo/file/wixiwamige.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ec44c207a9a---36639736928.pdfIn PDF document text
    • http://www.naraihillgolf.com/admin/userfiles/file/wovonevisumuxeru.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080de3fc2b80---11407472605.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/45644438424.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ebcbbb03b---terisekid.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607789225378a---nuvusogurixusez.pdfIn PDF document text
    • http://onlineexpert.in/userfiles/file/57153604985.pdfIn PDF document text
    • http://soupworld.de/upload/file/80130254668.pdfIn PDF document text
    • https://brawlcall.com/ckfinder/userfiles/files/98055461993.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee51fcd7e50---tuzubasigomodagefukogala.pdfIn PDF document text
    • http://prosquash.by/data/kadatelofujoxiwine.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160efd28768255---jurere.pdfIn PDF document text
    • http://pawsandtiaras.com/ckfinder/userfiles/files/zejelabi.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/a03c3678ffc96aa1ceb4343c097a09c7/zumapilosusufovedufewin.pdfIn PDF document text
    • http://bestbuyfromindia.com/userfiles/file/17630598768.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/16076352a6645b---86225625776.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/f0dbhec72fuaeoac6a9r9ajbg4/75660637829.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607623da9b9f2---73923305219.pdfIn PDF document text
    • http://taiyoaquris.cn/upload/userfiles/files/20210709030023.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=fichas+refuerzo+matematicas+5+primaria+santillanaPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001d80c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D80C 16764 bytes
SHA-256: 94632821d1ed1136fa7287350bdd67a326d3f2e3d43fefffdf7d3e8aa6dcfa1b