Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d969beee76657f0…

MALICIOUS

PDF

380.0 KB Created: 2021-08-18 10:07:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 37c9e1ba54c55d66e51e7e8abd05cff0 SHA-1: 3fe495f047b8028ccd23cec7cf56bff178bc3677 SHA-256: 6d969beee76657f0d9ac04806c2c5d4a82a58efef0aa34aad584182772a2375c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous embedded links, many of which point to compromised WordPress upload directories, suggesting an attempt to host malicious content. The PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristic specifically indicates that these links are hosted on compromised CMS upload storage, likely to serve a secondary payload or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8570

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.
  • 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 https://haps.company/wp-content/plugins/super-forms/uploads/php/files/0p7qaj2ruq48smhmjv9omv3g60/feselazo.pdf In PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/9ba6f4dc9e9f6f734e91c3ab867b198b/nitovana.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/51e358dc7af8d5dc6c84c4d2a38266c3/banegepepe.pdfIn PDF document text
    • https://simondaulte.com/ckfinder/userfiles/files/geboxemidukanogip.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b6ebbe5dc42---xiridiramovuvu.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160905ed75114c---namitatepe.pdfIn PDF document text
    • https://www.propertyadvisersaustralia.com/wp-content/plugins/super-forms/uploads/php/files/71af16a92bd1d75026cd0e35e802ff6b/40771085940.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f27ebeeab7---mujegixurijug.pdfIn PDF document text
    • https://stef-nancy.fr/upload/document/43803672814.pdfIn PDF document text
    • http://tccsrl.org/userfiles/files/40041596648.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077dab888344---63439900665.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/a3b7bdf5bd90641c49787dec59eb1097/65101457673.pdfIn PDF document text
    • https://asiantms.com/ckfinder/userfiles/files/tetivesegunawegut.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/0tdafocspesc75koeosllq6467/numofila.pdfIn PDF document text
    • https://www.tamilsaga.com/ckfinder/userfiles/files/vujuxo.pdfIn PDF document text
    • http://club-integra.ru/userfiles/file/ganafizizifo.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611ade283d57a---50216364751.pdfIn PDF document text
    • http://feg.vn/uploads/files/noxopav.pdfIn PDF document text
    • https://artasedanasingaraja.com/uploadfck/file/16386568046.pdfIn PDF document text
    • http://luxcottage.ru/stroykamen/userfiles/file/dejuwikuwekalifepipusi.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/160893ca1c6b4b---lapujizi.pdfIn PDF document text
    • http://marketypik.pl/zdjecia/fck/file/pamawuxasisakuwal.pdfIn PDF document text
    • https://topclassgreenery.nl/images/file/tukemuvepaber.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160de5d180f658---69814565620.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/18078993270.pdfIn PDF document text
    • https://grandplaza.bg/uploads/assets/file/35455999982.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=what+is+manual+sign+languagePDF 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_off00057f65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57F65 18656 bytes
SHA-256: b6662be68d3dc4d9c510ee945ec4f890d1f62541a00fcc17c4149596e36cb9f2
font_01_sfnt_off0005b0fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B0FA 10428 bytes
SHA-256: 8caecf10fb41953a71d1796bc64ea2b8132269aa9db60816dc3c29b93161eea3
font_02_sfnt_off0005c871.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C871 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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