Malicious PDF — malware analysis report

Static analysis result for SHA-256 84ed89b6880baf05…

MALICIOUS

PDF

87.3 KB Created: 2021-08-15 18:09:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 830f88e122dd03ecee5cc2607dde2b10 SHA-1: dd3c605d4b648f872598e5440d3e19ad78ca57f6 SHA-256: 84ed89b6880baf05083d78c27a2b146b6534109f18136942c411614fc6772c57
154 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple domains, many of which are hosted on compromised WordPress upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure suggests an attempt to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9572

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://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2cc247f41f---nabokeb.pdf In PDF document text
    • http://dietetyka-24.pl/images/files/ditowimurozugeva.pdfIn PDF document text
    • http://lyzjkgm.com/d/files/puwoxutilere.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098c318188a0---99793495315.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160925fa1dfd80---dovenoki.pdfIn PDF document text
    • http://n2nnetworks.com/files/others/zokuderavulavilufu.pdfIn PDF document text
    • http://townofwinslowin.com/flash/townofwinslowin.com/file/51342184572.pdfIn PDF document text
    • http://novafish.it/userfiles/files/66841644913.pdfIn PDF document text
    • http://thegioidahoacuong.com/uploads/image/files/sonugoje.pdfIn PDF document text
    • https://nadinerogger.ch/userfiles/files/35972199773.pdfIn PDF document text
    • https://contact-house.com/fckeditor/upload/file/70597351114.pdfIn PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/9377cba2afc3620d59734dd238020585/29298854057.pdfIn PDF document text
    • http://balone.net/_upload/file///gidadib.pdfIn PDF document text
    • https://piuspvc.it/userfiles/file/83019856580.pdfIn PDF document text
    • https://syteq-pro.com/userfiles/file/bupuraruporedab.pdfIn PDF document text
    • http://ingenermarket.ru/userfiles/56753419678.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c3910fddc0a---tomobumimeloleruru.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/u0uua5drur4slfh2vs9slr13d3/55440061158.pdfIn PDF document text
    • https://juegosinflablesarizona.com/files/99340513914.pdfIn PDF document text
    • https://gamma-electronics-eg.com/userfiles/files/gumorumusobinatidotupefe.pdfIn PDF document text
    • http://bearings.vn/images/ckeditor/files/7879065332.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c0da4ea54f4---62701157011.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/2e4729bd8b344dfe96f10dc261362708/fewoj.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088dcbdbaee3---forelopirafiviputumifip.pdfIn PDF document text
    • http://lbhs1965.com/clients/6/6b/6bdd8f708684a1f547efbf97e1630fe5/File/fumara.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=smithfield+spiral+ham+cooking+instructionsPDF 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_off00012a5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A5B 19640 bytes
SHA-256: 18d482f46674de246340b2434600ddf5f289c02e1726dc8ca556cae205011305

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