Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a6e513142eadc64…

MALICIOUS

PDF

66.5 KB Created: 2021-09-07 09:50:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 97cf5f9378c2ec5d03fdd46db9276fa6 SHA-1: 64ada194813f0978b181c9840c508a34e24de785 SHA-256: 9a6e513142eadc64595a125b7d90793342c9877b983a29e16a2adcf8e44991f7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document that contains numerous links to external websites, many of which appear to be hosted on compromised WordPress sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. The embedded URLs suggest an attempt to redirect users to malicious content, potentially disguised as a free PDF editor.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6824

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://chcial.ru/uplcv?utm_term=editor+pdf+freescape PDF link annotation
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607676716fdb9---volivesav.pdfIn PDF document text
    • http://miele-service-center.ru/uploads/files/tobag.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160df8db3e6cf5---giwabubukuwovar.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606ee07c6de30---15368842466.pdfIn PDF document text
    • http://snnet.kr/board_pds/fckeditor/2021/07/file/butola.pdfIn PDF document text
    • https://shatalarab-llc.net/userfiles/files/lubujidabez.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/de5900c71a8cd85b15de1d3802258e77/fubiwuxoditebun.pdfIn PDF document text
    • https://bomnuocebara.com/quangbasanpham/app/webroot/upload/image/files/3203598511.pdfIn PDF document text
    • https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/35818f8551536c17bf929ddf6560d8b0/28673949294.pdfIn PDF document text
    • http://aliguoriarchitetto.eu/userfiles/files/zapuliwob.pdfIn PDF document text
    • http://hopkim.vn/upload/files/dudumapijotano.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b42bdd1433---72584773005.pdfIn PDF document text
    • http://2478.ru/admin/ckfinder/userfiles/files/80555274863.pdfIn PDF document text
    • http://capital96.com/userfiles/file/60276139985.pdfIn PDF document text
    • http://sonhanint.com/uploadpic/sun/files/202108271007461543.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/6d37cc125951d30117df66de94ca9151/99939649571.pdfIn PDF document text
    • http://vladjurnalist.ru/archive/file/95278860122.pdfIn PDF document text
    • https://adsbudget.net/userfiles/file/funijebegipalova.pdfIn PDF document text
    • https://www.pension-chevaux-haras-gabereau.fr/ckfinder/userfiles/files/gixiwefakiseliduj.pdfIn PDF document text
    • https://nergizleryapi.com/image/files/lasujotudekemeturezo.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1610ac55463f7c---rubedanuluwunuwixi.pdfIn PDF document text
    • https://anbuadidravidarmatrimony.com/ckfinder/userfiles/files/96203360060.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/85f5e3e3a393e29093343c058284f616/weragakapimevigit.pdfIn PDF document text
    • https://perfecthospital.org/FCKeditor/file/83448542715.pdfIn PDF document text
    • https://mediaget.com/userfiles/files/59655687816.pdfIn PDF document text
    • 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_off0000ea43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA43 10448 bytes
SHA-256: 4421cbad307d432c488978de3f99f780e4027ee499c6a4e6e84e954064ca6646

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