Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e538cb56526fa8f…

MALICIOUS

PDF

78.0 KB Created: 2021-06-17 05:14:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: eb7274131c52d93840c88d50ca596e74 SHA-1: af508a498b721f6a2d8b4d8d4ea5a6cc52aa5bc5 SHA-256: 4e538cb56526fa8fe04640798a59a79f0926294180c9de9855cb216e3e9c0684
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, likely leveraging embedded JavaScript for malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9596

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://smidgel.ru/uplcv?utm_term=class+12+integration+notes PDF link annotation
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e78817f289---19304225125.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160747f79a4a4a---20141216726.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/pn6ci5ce0o55tid73lqdjvhm2n/96737045623.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092cfa26af0b---43806037773.pdfIn PDF document text
    • https://panegovernance.com/ourprojects/chowki/UserFiles/file/37536983354.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/3a7d68de1c55ccf583fd47e3ad8c6a89/zukisibowedanasuru.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/gizevoxijudozoranug.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3b0507a8cd---16743772978.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/99930368817.pdfIn PDF document text
    • http://optikametuje.cz/userfiles/file/giraxugolepunudulux.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/6d0e922c7ed09202dab8df535b9eee0e/23876528312.pdfIn PDF document text
    • http://erdivigado.hu/userkepek/file/54189678511.pdfIn PDF document text
    • https://rijst.nu/userfiles/file/wejevevuz.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/flk7bflo2o0v3h11jaii5qos44/wusivomogopogawedu.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f070c588fd---83717483828.pdfIn PDF document text
    • http://mmbc.cz/_data/user_files/file/pelexesarinexadizakuzini.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/fuxup.pdfIn PDF document text
    • https://serviceservice.eu/userfiles/file/bumotofidesumuf.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/eug96qhptq05so1qsdlkqrrjj2/runojuliloluw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011d96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D96 4944 bytes
SHA-256: ce8ab22e55fc5aec209f8660f7fb4144370057bb29637f105c6c5677383ac69e

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