Malicious PDF — malware analysis report

Static analysis result for SHA-256 58cbaac6bf9a5f85…

MALICIOUS

PDF

169.0 KB Created: 2021-06-26 23:43:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 5dbc17b4bb0e27db8a0c4ab425036419 SHA-1: e6a631e8a9ca94c73dd6f12363a1bd426fe019e3 SHA-256: 58cbaac6bf9a5f85cf0fddb3e9f8bfcf63c490840bda86d6d020e5894d40cd9d
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. It contains numerous links pointing to compromised WordPress sites, indicating it functions as a link farm. The presence of these links suggests the document is designed to redirect users to malicious destinations, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8964

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 http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/2106ee27ac583fcf496945d25e7a34a5/27524944544.pdf In PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609d6bf583adc---sofubapevofaxigajule.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/8054368c63354bfa8a1d7de6015e6643/31147079805.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608111cadf5ff---lotaxewavu.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb1a8b8a82---buwepe.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16079df471c86d---mopelevodoxanotazuvumeb.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a705a5e58db---98837664489.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075951e78b71---85436136508.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e78b3465b2---resedisijelejidi.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/3b90623496dcfbe3f06bda5066360bd5/puvenetuloxet.pdfIn PDF document text
    • http://studiodabo.eu/userfiles/files/23867784211.pdfIn PDF document text
    • http://uticahighclassof78.com/clients/8/89/89c70e22fe5ad1405280b455f64975d7/File/kuzetepuk.pdfIn PDF document text
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb985376b5---tabadenibuwopusasikuwo.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ab69337a85---346247864.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2262be7796---zegomojis.pdfIn PDF document text
    • https://cafesca.net/ckfinder/userfiles/files/zajokibituxoxer.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/40aeabedc4af3fc391dc00c02ca54c0e/91233448228.pdfIn PDF document text
    • https://forumhotel.by/wp-content/plugins/super-forms/uploads/php/files/ub8aftq1hreg2qc5vtqmbbtlt3/58051319642.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/68f8dfef417e10b8f064832052973a7b/xagujon.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607890f7d8f69---derudokolopezezemufi.pdfIn PDF document text
    • http://locnuocvietmy.com/Images_upload/files/sutizefasusimovoxuledoja.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160b5a64ec4ef9---83743266926.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/dc64eab06008cea4a119714a0a21fba8/paratejugaranadese.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/f399593b6d9bb4866f07d018063a3ffd/37026954134.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=mission+impossible+rogue+nation+subtitlesPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00026711.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x26711 26796 bytes
SHA-256: 16b26ac04a50e837a7a315906392895d1c78dae711bfe5bdd353d416d15436b9
font_00_sfnt_off00018812.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18812 24776 bytes
SHA-256: f1ba0f290bba22de5ed6557b2631c4f0b4db5bb53be680da89bb7ed4463b37d1
font_01_sfnt_off0001c6f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C6F0 10828 bytes
SHA-256: 048117849d26ec61f63b0f213ceb22ef1ca81bb864a8c5b5ebee1823982ad926
font_02_sfnt_off0001dfaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DFAA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001f7b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F7B8 39800 bytes
SHA-256: d695acb55bb4de796846b0755840d92d002403d8975a8a4c1a774a870e406961

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