Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1e709267c26bb07…

MALICIOUS

PDF

75.1 KB Created: 2021-09-02 00:56:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 9dec7c7fbbbd1fb224e05afec9b0e458 SHA-1: 066510c76e7ba99e1c31f90529571d15375a4ad7 SHA-256: b1e709267c26bb07618245c794cc638cf5a461331113fde1093cee5d7721382b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress upload storage and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The PDF's structure and embedded URLs are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9827

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f3db175a2cf---67226020740.pdf In PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b05a7ccaa1e---boluvafejazesegurajiz.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160790f870e8f5---21368162014.pdfIn PDF document text
    • http://rebornfair.com/FileData/ckfinder/files/20210622_8277B8C8196744CA.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/bir3felet3hhifi3o8a3d9tva9/punefolamomubewulel.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/zokenaxo.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607f78f53b8da---perikoju.pdfIn PDF document text
    • https://tselectromechanical.com/uploads/CKfiles/files/jutagabopulup.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/d366119c4194028eb9a33bda60f6582b/20431635055.pdfIn PDF document text
    • http://fitviewer.biz/files/file/bejizugov.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/da5b6c590ee8a3ffa33ac6ebd91af7d7/tizovilabudor.pdfIn PDF document text
    • http://bdpq.hungminhits.com/files/uploaded/files/49500057576.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa4e998d88---fumesumope.pdfIn PDF document text
    • http://saintthomasmonrovia.org/clients/a/a7/a774d5b45fc75aba9c6fcf07501e1e58/File/govajixoluvimalolevuseg.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/286051feb292053009a3acb9146a5e31/1529181199.pdfIn PDF document text
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/772db180baac0cdbe40c2aa6d0d2ac3d/makizodowivufa.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/160e3c9b14b11f---70409217764.pdfIn PDF document text
    • http://banghetretunhien.com/media/ftp/file/72234824360.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/ed98fa7c24a7e8fa25b17342b9904ed9/bulirasad.pdfIn PDF document text
    • http://werkschoenenverkoop.nl/images/docman/files/zikavatofuni.pdfIn PDF document text
    • http://goodlife88.com/uploads/files/nufivuselijuja.pdfIn PDF document text
    • http://fornacedelia.it/userfiles/files/bajededonoka.pdfIn PDF document text
    • http://alliance-ltd.com/userfiles/kibixeze.pdfIn PDF document text
    • http://myucpb.net/userfiles/file/15780065623.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d42e39ec6d---12823667164.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160d7d02701db1---tafosobex.pdfIn PDF document text
    • http://lightofislamonair.org/uploads/files/38241975260.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=definition+of+cartesian+productPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c482.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC482 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dc94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC94 16188 bytes
SHA-256: f153d7c7f00975af4668bfdc0ea7f77483803c51386aa69d2d71daae1751abea
font_02_sfnt_off00010666.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10666 10668 bytes
SHA-256: c2106d8f23f295366741bcbc88f657469070862bd91c64d8f630278e67a9894d

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