Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d85ceddcad99429…

MALICIOUS

PDF

89.5 KB Created: 2021-07-01 15:41:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: d3ce977bb5fcadc42e8d741d9242e766 SHA-1: a25d655bfca63ba12b9ca580c66bde2f9679bc02 SHA-256: 4d85ceddcad99429b18e7a69ffc5bd4b2632eb107c41ffebb6755639ab574cd8
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. The heuristics reveal it functions as a link farm, directing users to multiple external URLs, many of which are hosted on compromised WordPress sites or disposable domains. The presence of numerous URLs, including those with UTM parameters, suggests an attempt to distribute phishing content or further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://archism.ru/uplcv?utm_term=baby+you+know+i+just+wanna+leave+tonight PDF link annotation
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160816cf63d843---dosegipupojepadopobugujo.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609882be06fb5---85863085006.pdfIn PDF document text
    • http://www.cenlajobinator.com/siteuploads/editorimg/file/71789575942.pdfIn PDF document text
    • http://goref.ru/files/file/15311357851.pdfIn PDF document text
    • https://paymentor.nl/uploads//file/rodozo.pdfIn PDF document text
    • https://mldom.xyz/web/img/podborky/files/seturofatomome.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072dd18809a7---99805112759.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/bijudadikarukujomo.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/lumjrvrkvda53stma34v5v4pgk/riwogudafonukan.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160776730e03fb---50929650828.pdfIn PDF document text
    • http://topenglish.sk/app/webroot/gallery/files/81279360483.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/6dd650acfd3683bd939f816b8814908b/9328682900.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c15611c857e---lizeganiguvazamuxi.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077c76dc01ee---91962204087.pdfIn PDF document text
    • http://kondicionery-ivanteevka.ru/upload_picture/file/39661817664.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/4d2916148aab5ddf6bdbeb87b35c70d7/taluwevalisazumipasilutul.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/1fjsabefdk78ekstivf15hol37/3494261920.pdfIn PDF document text
    • https://arch.ua/ckfinder/userfiles/files/90214193516.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a9751a9fb01---vomubepoxodovixavomi.pdfIn PDF document text
    • http://dok-vo.ru/userfiles/file/sexerazi.pdfIn PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/be295e3f49167d6cbe27cc254c1dae01/fovezorad.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_off0000fbe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE1 16600 bytes
SHA-256: 446a7a89d60b582f2f510ea00c3b556aeca0a227e2e8ee3184a1c63f6609c173
font_01_sfnt_off000126d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013eed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EED 11068 bytes
SHA-256: f9f319c35e825cf8585655be4fcd7e03397747165ab1e795362732ec2900b69f

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