Malicious PDF — malware analysis report

Static analysis result for SHA-256 894806fd28e7c07b…

MALICIOUS

PDF

156.9 KB Created: 2021-07-27 21:13:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 118e607e7f86e2d40f3daec6ef31bb0c SHA-1: 825964b131effc6e4024dbb7f93a4e7f85116e57 SHA-256: 894806fd28e7c07b7430f7203f87f8908b06c85833d35d5c2483ce7e3affdbf0
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that point to compromised CMS uploads and disposable hosting domains, likely to lure users into downloading further malicious content or visiting phishing sites. No scripts were extracted, but the structure and embedded URLs strongly suggest a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

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://alarcon-v.com/editor_upload_image/file/25509439661.pdf In PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/668eb302ceda0f420c7b371e5b8aad54/resupugibalupadav.pdfIn PDF document text
    • https://smartstone.ca/userfiles/files/83712352871.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607994fe1d579---sukovaxaxulelafutarum.pdfIn PDF document text
    • http://jocoseatee.com/userfiles/files/22458741806.pdfIn PDF document text
    • http://efuturesthai.com/uploads/file/vixezofipazemijegadolip.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/96caafe1db81e925eab23c217643e7d2/74157378635.pdfIn PDF document text
    • http://aps-mes.com/files/file/vezoxosamoma.pdfIn PDF document text
    • https://orig-shop-gsm.ro/ckfinder/userfiles/files/dolavetopinozi.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/21575268260.pdfIn PDF document text
    • https://ibextrail.com/editor-images/28757294847.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087fa0c139cf---mawovizirodenulov.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160e6e34ee8c54---18568960185.pdfIn PDF document text
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/3f521848916f1a536e68a03802ea46ad/55705371612.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b50610cb33a---69998113517.pdfIn PDF document text
    • https://resonanceacteurs.nl/userfiles/file/golitiponuka.pdfIn PDF document text
    • http://praxis-greve-polley.de/web/editor/files/56896642944.pdfIn PDF document text
    • https://qnzar.com/files/dogaze.pdfIn PDF document text
    • https://bdaudit.ro/userfiles/file/pixojebinexibobub.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160859fff09be3---90051475776.pdfIn PDF document text
    • http://coming-c.com/userfiles/file/18763224477.pdfIn PDF document text
    • http://klefmarken.se/upload/file/favodokosibagizi.pdfIn PDF document text
    • http://bukharasuwanee.com/sites/default/files/file/kujaxanupajoza.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=iqbal+day+speech+in+urdu+pdfPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0001d279.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1D279 27988 bytes
SHA-256: c9c15a7c70d78f9b93aa484e5421c51d8f601567936d1f24746099b6745bd23c
font_01_sfnt_off00020308.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20308 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00021b1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21B1F 10948 bytes
SHA-256: 1c1207e47b26e058912f3701b37b9ff4caab303b169eada3c5645257705b3268
font_03_sfnt_off000233f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x233F0 19088 bytes
SHA-256: aed9ec37a6512400dfcf4e6e2f6acc6e0dae3f5cec4516ea8c98b5a90e52b802

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