Malicious PDF — malware analysis report

Static analysis result for SHA-256 24ee7c1a436bfb90…

MALICIOUS

PDF

83.3 KB Created: 2021-09-01 22:20:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c9073b4f860c545a89452869e1a990d5 SHA-1: 685db7dc9ceadca489b35d24bd9b3c4478efa17c SHA-256: 24ee7c1a436bfb90b42d715f5dc808ed8cd368c482286a9779d1b36872960151
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate a phishing or malware distribution intent. No scripts were extracted, but the structure and URL patterns are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://cructi.ru/uplcv?utm_term=watch+weathering+with+you+free+eng+sub PDF link annotation
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/q30upngbr76i9svtef5f17b35o/77764575572.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a65f0954f3---67362163977.pdfIn PDF document text
    • http://mrsinternationalbeautypageant.com/clients/8/8c/8c0f0497d7166b07b5568c04be8084ca/File/29213325546.pdfIn PDF document text
    • http://aivieksteslaivas.lv/userfiles/file/1493035376.pdfIn PDF document text
    • http://nickels.design/ckfinder/userfiles/files/89154893892.pdfIn PDF document text
    • http://donateagift.eu/userfiles/file/jemoxubaxifowi.pdfIn PDF document text
    • http://palirna-frydek.cz/uploaded/file/rinizepijiraxuf.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b703427bc18---figik.pdfIn PDF document text
    • http://chi-kara.net/userfiles/file/25514554602.pdfIn PDF document text
    • https://yellowstonewildlife.com/62393499285.pdfIn PDF document text
    • http://natproperty.com/userfiles/files/gifapugepujidewoxat.pdfIn PDF document text
    • https://rubenoferro.com/userfiles/file/jiwalarimokip.pdfIn PDF document text
    • http://yjccnc.com/upload/files/fofoxixawowunefewa.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/pusolavexurerisejun.pdfIn PDF document text
    • http://luxcottage.ru/stroykamen/userfiles/file/98948399013.pdfIn PDF document text
    • https://hijaustabilo.com/contents//files/41847931016.pdfIn PDF document text
    • http://graczeonline.pl/userfiles/file/zoxukifumovukulurufamira.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/52vh57oih1qbcv8pobpp8prfle/bujagalulireni.pdfIn PDF document text
    • https://ariconium.cz/webpagebuilder/ckfinder/userfiles/files/40530883738.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/io16os81t8gkdsqqq1ub1rtlvh/38476200891.pdfIn PDF document text
    • http://m2mus.pro/clients/b/b1/b1ca46fdb12d68e762e4a8b3318caec0/File/pelawul.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/52c5fbfd668909747335d63fbcf7c3fe/24167204597.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/5f9483fd350ca971bebe4781b9478cc1/xilidig.pdfIn PDF document text
    • https://uangraja.com/contents/files/loxatalek.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_off0000db4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB4C 19376 bytes
SHA-256: c6aadeefe5993ba5787af2628b510fb20e9ccf25e7bfa0b042373d87035cd57d
font_01_sfnt_off00010d57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D57 11000 bytes
SHA-256: a52226428e60196f8cba69feee4b75834b3ea366f89f6fdd60afcfe656255c5d
font_02_sfnt_off000126fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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