Malicious PDF — malware analysis report

Static analysis result for SHA-256 efc525ea03316b78…

MALICIOUS

PDF

48.0 KB Created: 2021-07-25 16:26:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 5336a5c0ad22df9182400ae890a29567 SHA-1: 1c50d7a0e0accde546b6ff9796576599245fcb90 SHA-256: efc525ea03316b78402d7af846a3a0bd54729abbcb979b54febeb92d784771a0
154 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV. It functions as a link farm, containing numerous URLs pointing to compromised websites and potentially malicious content. The presence of multiple links on disposable hosting and compromised CMS uploads suggests an attempt to distribute malware or phish users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8568

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://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/647954868876c41a5a55245f6a7e677c/69131716360.pdf In PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c62dbb6e2b0---sajiradepumuxigefol.pdfIn PDF document text
    • http://doubler-son-capital.com/photos/files/77798960184.pdfIn PDF document text
    • https://ncsccalgary.com/userfiles/files/40283843282.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/mqvmdgi193ku533rp4asfsqmp4/jezazapaxere.pdfIn PDF document text
    • http://volamtuyetthe.com/userfiles/file/5614638208.pdfIn PDF document text
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/xadegipobuwezametud.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160bf1d8d4bd8d---14759070313.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a68f84a7a24---dupijivularekig.pdfIn PDF document text
    • http://consade.com/userfiles/file/15672332896.pdfIn PDF document text
    • http://envisystem.com/upload/userfile/files/wekakob.pdfIn PDF document text
    • http://kyanite.tv/userfiles/file/parina.pdfIn PDF document text
    • http://studiotecnicodavico.eu/userfiles/files/44300539425.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607c130cb68b0---xanagusotazibozab.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/96bef9324ac5c170be9ac5369b4858d7/sikugezoxeduxomota.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/63269336ff22327d6bd119c168616233/zenimasonugasanu.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/10491758755.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160720b9094e8c.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/49c769325ddb9eca437d3dce9786247d/vowibugojunepup.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606ceaf997abf---81627186708.pdfIn PDF document text
    • https://muacash.com/webroot/img/files/porejebamubewifog.pdfIn PDF document text
    • https://anukulagrotech.com/userfiles/file/84320294676.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/u6qaen5rhcugnnlqj4kb11o75p/supagesubasokifid.pdfIn PDF document text
    • https://pametnidom.hr/pametne_kuce/userfiles/file/25765139476.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=download+hotstar+mod+apk+for+androidPDF link annotation

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