Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2879cc2d28e6eaa…

MALICIOUS

PDF

80.0 KB Created: 2021-09-05 12:55:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 54174739c1f552b0a3c19767a06a8075 SHA-1: 7267131ecbef641b14b278a0090ca735bc854874 SHA-256: e2879cc2d28e6eaa35873c084f2b54edeb73fe1e7e73e916eb5f249200e02169
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress upload directories and other potentially malicious sites, suggesting a phishing or redirection scheme. The PDF structure itself appears to be a link farm designed to funnel users to these compromised locations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/5b7kkaiss2cnhai8lj3gpl5m84/zebogin.pdf In PDF document text
    • http://starlightcelebrates.com/clients/4/43/43e9139217482d7666ce300faf566241/File/vezofonomawuvunazugijeliw.pdfIn PDF document text
    • http://zuche0551.com/upload/file/finoxigega.pdfIn PDF document text
    • http://studioarchperissinotto.eu/userfiles/files/vodeda.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1609df4aa155d5---65804405869.pdfIn PDF document text
    • http://soles2walk.cz/data/file/25587302062.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/l3426sfd9k7fdqqhm3po5lc5h1/navejepelufurixorivoniga.pdfIn PDF document text
    • http://dellalontra.it/userfiles/files/zinunisijipimewibe.pdfIn PDF document text
    • http://radissonhoteltraining.com/userfiles/file/94669734086.pdfIn PDF document text
    • https://dansobentre.net/uploads/file/joxovexatugovinunedaz.pdfIn PDF document text
    • https://irrisyst.eu/files/file/jowurulim.pdfIn PDF document text
    • http://archerelectricsupply.com/userfiles/file/gubijixakirekonerupaw.pdfIn PDF document text
    • http://valkexclusief.reviews/app/webroot/files/userfiles/files/58278611081.pdfIn PDF document text
    • http://www.louisefarmersmith.com/admin/ckeditor/ckfinder/userfiles/files/nerizidanep.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160886015b86d2---17666112466.pdfIn PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/82417545800.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f9aa466b70---gijosewaluxi.pdfIn PDF document text
    • http://mvsexpo.ru/admin/ckfinder/userfiles/files/sokuxew.pdfIn PDF document text
    • https://www.sehersirin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086a76dd8a62---97427977067.pdfIn PDF document text
    • https://daleel.global/wp-content/plugins/super-forms/uploads/php/files/l7km0aoc8039h6pjapmmee2f4s/50854286052.pdfIn PDF document text
    • http://capriololaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/7042716231.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096f40e029b7---46120416480.pdfIn PDF document text
    • http://goodtraefarm.com/ckupload/files/71149866952.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/c8mr8e3qq52d4e0kcrc2pqm1g6/biraduzalukeb.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=past+tense+present+tense+and+future+tense+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_off0000d686.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD686 10332 bytes
SHA-256: 392d2620df3736664d8e4451e80ded5f4681f01c1d58e2eff910e12eefe76d32
font_01_sfnt_off0000edf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF9 17120 bytes
SHA-256: a7ffc62c22d3d78366a10dfd66c74cb7f91dfba1633584c3f99c7b0f97be5827
font_02_sfnt_off00011a5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A5E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1