Malicious PDF — malware analysis report

Static analysis result for SHA-256 64f25cce14709e9b…

MALICIOUS

PDF

50.4 KB Created: 2021-10-02 18:10:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: a1e99284171610eae1946c1ac6887807 SHA-1: cbbbbd7d96ae7a8316b1da85280efbcee54ad3ba SHA-256: 64f25cce14709e9b73f4de691f73901a8672735cca6671b6fca3c65c46a821b1
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for malicious PDFs to execute code or redirect users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is designed to host numerous links on disposable domains, suggesting a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8772

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
  • 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://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16147a46d5ac04---xunimiranodumujebuxofugim.pdf In PDF document text
    • https://www.sensiblemachines.com/ckfinder/core/connector/php/files/73792269616.pdfIn PDF document text
    • http://maxidmum.com/images/upload/fck/file/60359602371.pdfIn PDF document text
    • https://yourdentist.ro/app/webroot/files/userfiles/files/terituxenewazererugewi.pdfIn PDF document text
    • http://101balkon.ru/upload/files/gesujujetowidizofisozubu.pdfIn PDF document text
    • https://turismo-galicia.es/ckfinder/userfiles/files/jakosow.pdfIn PDF document text
    • http://csc021.com/userfiles/file/20210907131947_692eej.pdfIn PDF document text
    • http://mundori.com/js/ckfinder/userfiles/files/52584918595.pdfIn PDF document text
    • https://goldmenu.com/userfiles/file/77623191698.pdfIn PDF document text
    • http://rockpapersun.com/upload_mce_image/file/fugugugujazusawelivevu.pdfIn PDF document text
    • https://vcvscr.cz/www/www/fckphotos/file/87448387754.pdfIn PDF document text
    • http://dienlanhlongan.com/upload/files/18997496024.pdfIn PDF document text
    • http://www.julietlandau.com/fckeditor/userfiles/file/zedanuvidotalufedig.pdfIn PDF document text
    • http://doggystylzgrooming.com/admin/photos/file/wevalalu.pdfIn PDF document text
    • http://namngonviet.com/user-/files/duremugilexokufitu.pdfIn PDF document text
    • http://playbabydoll.com/userfiles/file/78136003715.pdfIn PDF document text
    • http://gernano.eu/gfx/userfiles/files/morimurimugilivamuvu.pdfIn PDF document text
    • https://soechi.com/userfiles/file/65329251456.pdfIn PDF document text
    • http://szm.hu/userfiles/file/1560077462.pdfIn PDF document text
    • https://evergreencans.com/userfiles/file/varegaketajip.pdfIn PDF document text
    • https://limsurdua.com/contents/files/81893896207.pdfIn PDF document text
    • http://3e3i.com/UserFiles/file///43191211056.pdfIn PDF document text
    • https://www.pelicanfinancialnetwork.com/ckfinder/userfiles/files/14627091780.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=how+to+turn+a+word+into+a+pdfPDF 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_off0000b020.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB020 10324 bytes
SHA-256: 4b86997b3a208134c7e5c48f4c98054e72f6d911ae5315b70188578a989288ea

Open this report in the interactive analyzer, or submit your own file for analysis.