Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee4f071bd3514835…

MALICIOUS

PDF

83.7 KB Created: 2021-09-03 13:34:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 08143ea771479595ff82672f60f50b8f SHA-1: 1547bc59b2c3087c64ad2a7b7fdceee19570aacc SHA-256: ee4f071bd35148350a004d774782dab0e0f5f0cc7f69657e752638f3e3a32c8a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The file is identified as malicious by multiple heuristics, including a critical ClamAV detection and a high ML classifier score. It functions as a link farm, containing numerous URLs pointing to potentially compromised WordPress sites and disposable hosting. These links likely serve to redirect users to malicious content, such as phishing pages or malware downloads, aligning with a spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/k6u5q72pq9cpfsftb4d360mi10/lodetiridekekonoze.pdf In PDF document text
    • http://jowinbio.com/upload/files/202108150713106416.pdfIn PDF document text
    • http://electriccityusa.com/images/fck_uploads/file/buzofoxodibatude.pdfIn PDF document text
    • https://hizlipin.com/calisma2/files/uploads/kiluvasemixigumogov.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aca20fb2820---55662046649.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b32ee53aba7---15508264877.pdfIn PDF document text
    • https://saleskerala.com/ckfinder/userfiles/files/88144808806.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/4ffe0609478327dbe1cdac43729ff159/3435618150.pdfIn PDF document text
    • http://sjatupornservices.com/file_media/file_image/file/70297498036.pdfIn PDF document text
    • http://studiospazioambiente.it/userfiles/files/8805093836.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160ad0b2f252c2---86022957063.pdfIn PDF document text
    • http://lordbeaverbrook1973.com/clients/76835/File/xuvesakefasazexe.pdfIn PDF document text
    • http://dragonspond.com/uploads/files/selazajuvala.pdfIn PDF document text
    • https://cafesca.org/ckfinder/userfiles/files/87150228425.pdfIn PDF document text
    • http://caratow.eu/userfiles/file/nufevebazidedifovo.pdfIn PDF document text
    • http://6nergy.fr/6nergy/sites/default/user/file/xalosomugafowakafus.pdfIn PDF document text
    • http://hidropro.hu/upload/27981669262.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/ina18rbop7j4md4m3er6ls8nu7/13003220050.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f980707c4e---95070712900.pdfIn PDF document text
    • http://n2nlah.org/UserFiles/file/42620682777.pdfIn PDF document text
    • https://southwestlooms.com/admin/userfiles/files/komap.pdfIn PDF document text
    • http://permanentnimakeup-brno.cz/userfiles/files/66248200749.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16095e28f73535---97499121343.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/16115b5b68676b---51665766854.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=unicel+dxh+800+manualPDF 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_off0000e116.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE116 18344 bytes
SHA-256: 344ae83040312915c7b873882aab601ea626b68477592fe47dc6c98169fe0977
font_01_sfnt_off000110ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110BA 10688 bytes
SHA-256: d2b3ba407b0409e3131874d0473aa9bff304580f7bd335b7eb26fc2efb347dcb
font_02_sfnt_off00012905.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12905 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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