Malicious PDF — malware analysis report

Static analysis result for SHA-256 042d15b6d19910f2…

MALICIOUS

PDF

89.6 KB Created: 2021-08-12 18:24:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a1f383f5b0fb3099e373daa839482524 SHA-1: 09a8ea1f401e3cff46128ce1be94d1e0a72bc148 SHA-256: 042d15b6d19910f2cfb5344802ec86d1f07321e80a88022337a0a3dba5a93289
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs that likely lead to phishing pages or malware downloads. The presence of external URIs and link farm heuristics indicates a strong intent to redirect the user to malicious content. No scripts were extracted, but the PDF structure itself is designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 https://crewmak.ru/uplcv?utm_term=pirates+of+the+caribbean+3+telugu+dubbed+full+movie+download PDF link annotation
    • http://arcadia6465.com/clients/f/fc/fcac8d81e62e7f23ed02b02243def538/File/41676839097.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/podusifewoz.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606de6c664606---zujamejiwipujaxodo.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/7696e9183059d50bae68f2366dd70728/weretefizuledokogipop.pdfIn PDF document text
    • http://charugarware.com/DEVELOPMENT/charu_garware/uploaded/userfiles/file/tesokabovevotisawuvaw.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16076c2360d3b1---fororumilat.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/44484040612.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8682e29954---tenogepulireli.pdfIn PDF document text
    • http://wsp.pl/userfiles/file/pibupajemo.pdfIn PDF document text
    • https://spacio.hk/attachment/file/60514983877.pdfIn PDF document text
    • https://charlesstreetvideo.com/userfiles/file/nukalole.pdfIn PDF document text
    • https://solidpractise.com/files/userfiles/file/xajevuberufotiraxabok.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad117ebf4fb---mawaxezazubafa.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ab398979d58---40462888161.pdfIn PDF document text
    • http://parcroyale.hk/userfiles/kebenumuwugogojotax.pdfIn PDF document text
    • https://pbchistoryonline.org/uploads/file/peratakarerusirerisu.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609636c078110---32104724722.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/4l25678umc67j4jstcj3j0l97l/govuvuwagomipakiromururas.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160ba256ceac5d---84391317544.pdfIn PDF document text
    • https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/523dcecd4478f4f7124c60ce580b9ded/sinalewixubudekade.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad8822b26b---37780958994.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/f7891f997e58218936ea785922c068fa/26666551647.pdfIn PDF document text
    • https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd1a297323---guruzufedomoji.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/675vfhg0045mlvp5geos299q95/razopadu.pdfIn PDF document text
    • http://calisnt.com/uploads/files/41232190271.pdfIn PDF document text
    • 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_006_off00010b4e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10B4E 18988 bytes
SHA-256: e8524a416391f88198430fbfaf4d419028aef4cd23ca127f2b5ace70e1ed1fd5
font_00_sfnt_off0000d85d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD85D 11488 bytes
SHA-256: 78beb14efb358ff8ac5ac2e6a4d73de3a66eaed6528e9aca7d51cd7e2f6a1778
font_01_sfnt_off0000f33d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF33D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000129e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129E5 17324 bytes
SHA-256: 0d9ea677490d15b83bb880dc40246d01f1be3e3f3c5397550c94d846909a91fd

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