Malicious PDF — malware analysis report

Static analysis result for SHA-256 88d76613d1f41c41…

MALICIOUS

PDF

99.7 KB Created: 2021-06-25 04:01:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 90b9d8889cb6d149f6a94035e4aa973f SHA-1: 7cd69c4a99274010a3a1406cf4534b8a46bc1f3f SHA-256: 88d76613d1f41c4155ffd86d8d5576ad3ce8d73243f9a4981db640d60811c3cd
154 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8953

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://shop-ecobati.com/medias/upload/files/rirumasunusotesula.pdf In PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160799f6dcc17f---60950951023.pdfIn PDF document text
    • http://hk-dcc.com/wp-content/plugins/super-forms/uploads/php/files/bvp5256tmscntvcghrsbhb3d3m/lumotom.pdfIn PDF document text
    • https://vatlieutaphu.com/upload/files/51901824322.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/3evu6h3pb6jggmqmrrpisdqtb2/lotav.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/1b7aaecba6258b2e927d9502d3c27c1f/7806008898.pdfIn PDF document text
    • http://paillasse.hu/userfiles/file/gemozuz.pdfIn PDF document text
    • https://klairtransport.com/uploads/files/15724286897.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/465005f1649dbb8f4b85cd423dc02b37/muvanuteno.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/0db54717e9074aa9752022a538739621/winisefukemaretinafojove.pdfIn PDF document text
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/g63kb7ch7p439smqt6c4ij3un3/68270396683.pdfIn PDF document text
    • http://sistersaviopublicschool.com/userfiles/file/53105412291.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609ecfb315bc0---xoxinurezifivofare.pdfIn PDF document text
    • https://isleo.com/i_photos/file/78569200889.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/252c509d5e5e638ac65511ccf73b77e3/99419549105.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=electromagnetics+branislav+m+notaros+pdfPDF link annotation

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