Malicious PDF — malware analysis report

Static analysis result for SHA-256 74012214b2f78c10…

MALICIOUS

PDF

76.2 KB Created: 2021-09-16 03:18:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 3d7fe8939143e4b94bc5f2d34f19df9e SHA-1: d8907f4336eddbe42462f9b063cd384416b5f065 SHA-256: 74012214b2f78c1074710f5c461137d0c1e1bea0aad8f2026319c5868e9abd64
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to PDF files hosted on compromised CMS uploads or disposable hosting, suggesting a link farm for SEO manipulation or malware distribution. While no scripts were extracted, the nature of the embedded links and the detection results strongly suggest this PDF is part of a phishing or malicious content delivery chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8143

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 http://gz-chengeng.com/uploadfile/files/49720692999.pdf In PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614162e5ae970---79735956735.pdfIn PDF document text
    • https://saint-florentin.charcutier-traiteur.fr/ckfinder/userfiles/files/5912317339.pdfIn PDF document text
    • https://ppntassone.it/dati/upload/file/72452382333.pdfIn PDF document text
    • http://theprojectmanagement.guru/cote_dor_import/admin/ckfinder/userfiles/files/59245086682.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16131a6592ec2e---fawadofibegutanu.pdfIn PDF document text
    • https://hanyauntuktesting.com/contents/files/zapevidukun.pdfIn PDF document text
    • http://bociany.sk/media/file/70090180882.pdfIn PDF document text
    • https://ismart99.net/upload/files/32997038595.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/161424d3fa93e5---temazosojad.pdfIn PDF document text
    • http://horizonpestservices.com/userfile/jupawabe.pdfIn PDF document text
    • http://german-ex.com/images/blog/file/49060325204.pdfIn PDF document text
    • http://vecsecity.info/editor_up/peduwunovabisedokixuji.pdfIn PDF document text
    • http://viettelhaiphong.me/data/dulieu/files/7936218967.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=mutants+and+masterminds+powers+pdfPDF link annotation

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