Malicious PDF — malware analysis report

Static analysis result for SHA-256 4eda39a0bf24702e…

MALICIOUS

PDF

96.9 KB Created: 2021-06-28 04:05:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: dc4a6919359fe251e016a94ed478789f SHA-1: c2eae35db9ecf3f710943f6a6d473e665b459829 SHA-256: 4eda39a0bf24702e005673d93393550d1ea7bc2866ffc0b3fca9717e798c8bd1
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites acting as link farms. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The document body is unreadable binary data, offering no direct content clues.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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.biz/wp-content/plugins/super-forms/uploads/php/files/5bn4r39hs6cvh3l8c6svssj7g2/sifijux.pdf In PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/ajsomrse1929q68mqsd5g3o7up/fobemazase.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bc60706ad5d---fekowefiwajosuwafebasotis.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/muxopin.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a636755780b---80070961681.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d25cf0462---ropekabedemasekosukoxew.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/796a1188032ca8cd3f1dad8a182aff5f/padepanasiwapomireraru.pdfIn PDF document text
    • http://mientaytourist.com/uploads/files/nunupokenuner.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/160cb7bac6f9f1---faxobusufurubemiwelisa.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/160729b7820055---82041697282.pdfIn PDF document text
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/i5hfpok0j0aprp00rprqf2bat2/39674183634.pdfIn PDF document text
    • http://insfilings.com/skyzone_classic/upload/files/48655765104.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/b69a9a8f9b9e95295b0ddb1fd638f19a/gusesafaku.pdfIn PDF document text
    • http://pomocnaukowa.net/Upload/file/rumuteg.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608c306842dba---rabeluzepa.pdfIn PDF document text
    • http://bezpiecznamlodosc.org/files/file/18272567645.pdfIn PDF document text
    • http://suachuaspa.com/upload/images-content/files/neverakofoxas.pdfIn PDF document text
    • https://lionkingbali.com/uploads/file/wimetopajaton.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ba363eb9948---sedofutopolixukepibax.pdfIn PDF document text
    • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/4f2e079393c48a79b9d8eab855064307/velonofanisafixum.pdfIn PDF document text
    • http://exmar.it/foto_fck/file/83462309779.pdfIn PDF document text
    • http://dobrasekacka.cz/userfiles/file/65827701131.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad3eaa20c40---29666473636.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=benefits+of+eating+coconut+meatPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00015812.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x15812 18656 bytes
SHA-256: 7ffb76493bdfc2c57ef353bd8b40282d96235be1f27ae2d6553a62a4c7df9a01
font_00_sfnt_off0000fa7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA7D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011294.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11294 10684 bytes
SHA-256: 48a59901dd566240d5f208fb72f2b89c3f33d7fcc62457b9ceb0d834514fa9ab
font_02_sfnt_off00012b27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B27 17240 bytes
SHA-256: 5921e0b208286162728cc14153ff187bb496225eae0dd26e371d4ffdc58cc571

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