Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fb074c4205c8204…

MALICIOUS

PDF

86.7 KB Created: 2021-09-04 04:28:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: ac01c729d526dbcf6955f41e4e69a72c SHA-1: 5a476cfd76e361ca3cb172a7542979156e6e49a1 SHA-256: 7fb074c4205c8204deb141fb814a2f056cc27bfa21731d1299192762f09065b4
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised CMS uploads and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall detection score strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://infrive.ru/uplcv?utm_term=macallister+hedge+trimmer+manual PDF link annotation
    • http://maurovalleferroarchitetto.eu/userfiles/files/wukiduvosed.pdfIn PDF document text
    • http://houstontca.org/Content/uploads/files/pivukadidaw.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/7f9f65d22c5f65d726e97e200dbb34d9/wunoxejoketuzid.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b929122d545---4678189471.pdfIn PDF document text
    • http://stellar.ru/ckfinder/userfiles/files/54695202201.pdfIn PDF document text
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ab37a8d9002---93356087573.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d86bbf7c92e---92262078704.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8e0d6433b8---lunepezujezokekuw.pdfIn PDF document text
    • https://alamansyria.com/userfiles/file/morozuverol.pdfIn PDF document text
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/fd1b05190dc7f98d0b783f50eed77fa1/23447701515.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b76fa635afa---tegubofeg.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/zukogosugodatet.pdfIn PDF document text
    • https://divetechmarine.com/contents/files/guvalawovazebulemutadane.pdfIn PDF document text
    • http://wienbildarchiv.com/upload_files/files/wawopafosuja.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/6f2a7c763d84edeec9282891ed8969a2/niliwe.pdfIn PDF document text
    • http://thecountryclub32055.com/userimages/62700367724.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/42f8e71999bf41aa1824eea3c73040ab/kikesirolamiduwon.pdfIn PDF document text
    • https://foodvellythailand.com/upload/files/57122403907.pdfIn PDF document text
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/jisoeee7r6i06jsvbb3e6tdf2t/warimefiguxuzovuji.pdfIn PDF document text
    • https://thesaddlebank.com/wp-content/plugins/super-forms/uploads/php/files/kr1faij8o4484b3qhs9b85kcrm/1830550005.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086636dd3152---zipotoziwisuxurajiveluxar.pdfIn PDF document text
    • http://odesignlab.ru/admin/ckfinder/userfiles/files/13944066014.pdfIn PDF document text
    • http://yunnanyingxiang.com/ckfinder/userfiles/files/36952740737.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF4F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010766.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10766 10788 bytes
SHA-256: 5224c11186094bd4b0d0adf44de9637051188a2ef50b2c104f96edb59f3de790
font_02_sfnt_off00011fd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FD5 17740 bytes
SHA-256: 47a21a7c35440c72da033da9835778c10f5f75e39914d45936309655c4cf5b99

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