Malicious PDF — malware analysis report

Static analysis result for SHA-256 45f165f78bcdf8c2…

MALICIOUS

PDF

141.8 KB Created: 2021-06-29 03:15:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 11df927fa6f1d3b0c5049ccb56b58899 SHA-1: bd8b797fa9038d37a08df7dd43217d2d4e6bcd47 SHA-256: 45f165f78bcdf8c285ad0ef7a02967a8a592f3247f9f6f0ba90a55fafe9db6ab
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous links, many of which point to compromised CMS upload directories and disposable hosting, indicating a link farm designed to distribute malicious content. ClamAV identified the file as a phishing trojan, and ML classifiers also flagged it as malicious. The numerous external URIs and the nature of the hosting suggest an attempt to lure users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6382

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://kvbm.org/pds/userfiles/files/wutazexedefamejamagir.pdf In PDF document text
    • http://jjmcp.jp/userfiles/Image/file/47291943731.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607faf2e3448b---70658868094.pdfIn PDF document text
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/gius68dsbiv7dg0fogtctl51e1/97060927875.pdfIn PDF document text
    • http://princeverma.in/uploads/files/lizemigoxefokako.pdfIn PDF document text
    • http://geoplan.su/userfiles/file/73803788818.pdfIn PDF document text
    • http://samrayburnclassof1980reunion.com/clients/873185/File/97207877985.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609044e4e6582---81444978348.pdfIn PDF document text
    • http://liyangah.com/Upload/file/98588522674.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/d6gg27qiirspaci52bfakuoo67/jegulebafisataxemopaluxe.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/417223a5a2cd64965ca999de946afd5a/47185720337.pdfIn PDF document text
    • https://catwalkdogcome.com/editor_upload_image/file/22974814225.pdfIn PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d324a3a62f---vuzunotugemenipe.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/ef2e516ac0cd90ba99661cccd7228259/dazado.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/160d3907d6e136---16701691884.pdfIn PDF document text
    • http://01host.ru/userfiles/files/gigubub.pdfIn PDF document text
    • http://dientrotiendathc.com/media/ftp/file/82021162537.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/26d655e09c8efc6a893a617df3a54a1c/latawixi.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/e47f332ad298934df15d834ec8b5deaa/ruwumixivenadarexelavamuf.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/0f57f15a8cc041f96add1ebff0fea7fa/7896658813.pdfIn PDF document text
    • http://cafesezony.ru/fck_editor_files/files/24465214252.pdfIn PDF document text
    • http://wo-kop.pl/userfiles/file/59173322739.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/688896944a0dc4a0bc200bc5f052585a/binifew.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=spelling+of+recognisePDF link annotation

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