Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a1b74d91dd842ed…

MALICIOUS

PDF

77.6 KB Created: 2021-07-14 09:04:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e918fe3ecbee4272d3c33de26b0e53b3 SHA-1: ba6aa3cb76c25ed09cc5f8bc8f71c22c8dc825be SHA-256: 1a1b74d91dd842eda1ebe55b0af110fd4dc82d0ead4f2de743ea6b58c96b02fc
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS upload directories, suggesting it's designed to lead users to malicious content or phishing sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6968

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://drafthe.ru/uplcv?utm_term=stranded+deep+cheat+engine+ps4 PDF link annotation
    • http://beloezoloto.ru/userfiles/file/65274809032.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085edb116860---82215974439.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/nd3qpjn6qvb7853vfj86brfvqu/24220506345.pdfIn PDF document text
    • http://plymouth-logs.co.uk/ckfinder/userfiles/files/kiwusenurasuri.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d9f2e9cd431---67868984968.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5acc5277cf---87743480464.pdfIn PDF document text
    • https://eletmodguru.hu/files/files/lepetegekixoposojuvux.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/nrm1num3jigmncedcnrqae62m1/10080038463.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd18a49d374---debur.pdfIn PDF document text
    • http://julianowka.pl/ckfinder/userfiles/files/43835194390.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a09f40a31a4---xikebuvabejexesix.pdfIn PDF document text
    • https://solidpractise.com/files/userfiles/file/72967673684.pdfIn PDF document text
    • https://congchunghadong.com/uploads/files/pemasexiketiwot.pdfIn PDF document text
    • https://osakadentalcare.com/contents//files/xizarogaronamuda.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/1ceopf41lgoeflo3uufpgdmkjl/pekakafuvotubuviduruz.pdfIn PDF document text
    • https://ekransamara.ru/files/61783725747.pdfIn PDF document text
    • http://ehsclassof64.com/clients/b/bf/bfa5c4411462ceee4a19e543862d902c/File/sozem.pdfIn PDF document text
    • https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/69e77d6ccad45111b81dce2303d5a445/65317683344.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098d4d20fec5---97458728294.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/79ab9c2a770d71cb1eea88b1c615f8d5/53126248406.pdfIn PDF document text
    • http://bularz-auto.pl/images/userfiles/file/pumefudagobu.pdfIn PDF document text
    • http://ahchala.com/img/file/30022768567.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f77e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF77E 10780 bytes
SHA-256: 14f6bde6f167007f757dbf35221ed2f087c93db6c5c938e9605469491f13fbe7
font_01_sfnt_off0001100a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1100A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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