Malicious PDF — malware analysis report

Static analysis result for SHA-256 25e821da0a1352e0…

MALICIOUS

PDF

89.1 KB Created: 2021-07-04 12:10:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 2e930b95d88a138a208327b79b3dd2f6 SHA-1: 2aa1b6fc79c913b14967b2af7b7198e6d1e67a3d SHA-256: 25e821da0a1352e09d410dc637180ab28e106c8de0649d2d22a115f8d8d00c68
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious or phishing content. The presence of these links and the overall detection indicate a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://coretry.ru/uplcv?utm_term=lake+willoughby+nude+beach PDF link annotation
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/rl6r9djh77c28cr546poa72ihv/vazegewotejuvanikurabo.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160a6517ae08ac---91599011842.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/0869e5096cd609d8a6ffd83d98bc48a1/84882235744.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16087ec3bc5870---kateweferuwilezonij.pdfIn PDF document text
    • http://clinicaveterinariagussago.com/userfiles/files/mojixukunidapevukaki.pdfIn PDF document text
    • http://thebellingerfamily.com/clients/0/05/05034faaa501c69409a7459485cba135/File/fopozerijewu.pdfIn PDF document text
    • https://apoiotelecom.com/imagens/img_fckeditor/file/68989195286.pdfIn PDF document text
    • https://carparts-fixture.com/file/file/52694761802.pdfIn PDF document text
    • https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/7t53crdl5prdbf6bdsc2i56teq/15798262844.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/h5sdlo8hnbujmffr5tsduoq55t/17037355852.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/dc009df9d5b1713bd2cd1610e8699bd0/16686577252.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/eg561h0cikhsomtctvcdn9sjr1/72124145144.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c263b215522---54341826856.pdfIn PDF document text
    • https://susta.vn/userfiles/file/6697941262.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/df2vfl27vd93ko6mt153a1il8t/ruxibunadivugabafifin.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/b2ae6047d6feb1735d9e566e9b17e442/sixekikufebibupejumag.pdfIn PDF document text
    • http://beachhigh65.com/clients/879402/File/54333551790.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1606f7f2b108b0---wapiwukasavolago.pdfIn PDF document text
    • http://yourhealthyanswer.com/ckfinder/userfiles/files/84033101557.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a6093930f93---4814174033.pdfIn PDF document text
    • http://nrnchina.com/test/images/ckfinder/files/57182144873.pdfIn PDF document text
    • http://summitremodelinginc.com/userfiles/files/11656162914.pdfIn PDF document text
    • http://candientushinko.com/images/file/tenonopifugo.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_off0000f85c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF85C 10772 bytes
SHA-256: fc2cd0e9f5db7b90c361196417ae5a83e2189ee00e6e8d84738fee16f77d0b8e
font_01_sfnt_off000110e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110E6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000128f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128F8 17688 bytes
SHA-256: 77e03418cc1f7758e7cd6b9bfb12d9a3432a4a157a18d3432c41c3de5dac2d9f

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