Malicious PDF — malware analysis report

Static analysis result for SHA-256 76347a478d9d8aeb…

MALICIOUS

PDF

83.1 KB Created: 2021-09-07 17:21:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 23cd43a37f29e61bee0f4bf44d1bb2b1 SHA-1: 1e9eaa7dcf3c8de4f53ccacd73ebf88ed1393488 SHA-256: 76347a478d9d8aeb9238e0768cf541cfa1644d3cd31cfbfb705b265757676744
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to compromised or disposable hosting domains. These links likely serve as lures for users to download further malicious content or visit phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://arci-mp.fr/admin/File/38208461622.pdf In PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a191c1912bc---83404655052.pdfIn PDF document text
    • http://longthinhphat.net/uploads/files/pibozali.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/tfj0dq6q3j8avq9r8jk2dmhpn4/60408228962.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/e8989b5265d66a00833e7d275757c3fc/vojiwuduwasinavozogujadow.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/5gfjnsae4t7d77hk9e5alh8ct6/netifedotiwowome.pdfIn PDF document text
    • http://singer-island-condos.com/userfiles/files/29240660288.pdfIn PDF document text
    • https://dvg.asia/ckfinder/uploadfiles/files/vobapaz.pdfIn PDF document text
    • https://china-glass-mosaic.com/userfiles/files/20210625_030618.pdfIn PDF document text
    • http://naasschoolofmotoring.ie/fckeditor/userfiles/file/81097171114.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16084d179d6bb4---14708026124.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/16071ac4e99979---sijubibozaxofumejo.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/newabugovutapop.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/8442b6eaa06263333347bfb39d3cf6b7/lazasakines.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/812949860a8e72aa4850.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b52547422a---1045730710.pdfIn PDF document text
    • http://haozuowenwang.com/imagefiles/file/wojuvaxaduwugen.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/118f3a0960ee3551a18bd76684ae5fa0/pijuvusoxuke.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/mhnf19prl8fmpbe96tfhd90vf6/sobavekisogogave.pdfIn PDF document text
    • http://piotrkowska77.pl/zdjeciafile/66409368798.pdfIn PDF document text
    • https://saatyapi.com/upload/ckfinder/files/narirezuwarinukoluzow.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/82456452306.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607489c595c55---tokaniwezijev.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b8da0f6826e---nebapifaponolebex.pdfIn PDF document text
    • https://berbagiangka.com/contents//files/39459874080.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/8c0f6d478efaecefa8b0bb6f1094275d/6581457142.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=vocabulaire+immobilier+anglais+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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE3 18900 bytes
SHA-256: b1b7333faa05ece8a077c38ca9ab530cc838dc9e87f50134839275a828d467e2
font_01_sfnt_off00010b30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B30 11072 bytes
SHA-256: b7ac63d6e8e4e252f89fec7bde5af288e16c901580e2627b3ea288578f4abf22
font_02_sfnt_off00012489.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12489 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1