Malicious PDF — malware analysis report

Static analysis result for SHA-256 97421a72c68de11e…

MALICIOUS

PDF

88.2 KB Created: 2021-06-28 13:46:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 906b8eadf9c2364f96088780a2e2bd78 SHA-1: 80502b6ee0ac271be8bda34e7d7e3527d22e706c SHA-256: 97421a72c68de11e2a8a575730e9bc437347009283a2d0b6e749b2b9c361a5c5
156 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous URLs, many pointing to compromised WordPress upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of external URIs and compromised CMS uploads suggests an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://drafthe.ru/uplcv?utm_term=mchenry+county+land+records PDF link annotation
    • http://mtecommerce.it/public/news/file/67530592777.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ea29519fb---kamuzeduxezuzijiwu.pdfIn PDF document text
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1607cd04c58244---foluzoxupabo.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/94cuhc1oqk8ehh5j17ftgbp8lo/wisog.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608fb976b66fe---80292971040.pdfIn PDF document text
    • http://tuzvedo.hu/elemek/file/morosiwetujixesimed.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/g7ijofhapba7vuo593vnu9h8dc/84057292094.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/e2a65ececf3d41ab485946e4fc5cd5f2/1338066653.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/68f297552a5f289d8e66c18b733393ec/51717205700.pdfIn PDF document text
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/5nff0mhd3aijeu8tbc952en65d/fufemowo.pdfIn PDF document text
    • http://hpworld.hu/data/pic/Image/file/josifozelasowitiroboz.pdfIn PDF document text
    • http://eprdel.cz/userfiles/file/pikun.pdfIn PDF document text
    • http://losmarinoslanzarote.com/marinarubicon/admin/file/noxazabekamatajofezute.pdfIn PDF document text
    • http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1608285094786f---gagapen.pdfIn PDF document text
    • http://usarsenal.it/userfiles/files/vogusamozuxiwali.pdfIn PDF document text
    • https://giasusinhvien.net/upload/files/mesijozakalal.pdfIn PDF document text
    • https://ukdirectremovals.com/wp-content/plugins/super-forms/uploads/php/files/79e092156602b5afd7e2540d04534562/fuzebojeta.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/79c37625b70f4be1ea6138a82427ca4c/lizupadulatema.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbf669d361---famajinagexu.pdfIn PDF document text
    • https://motelandratecuci.ro/userfiles/file/gedepizubena.pdfIn PDF document text
    • https://kodcomputers.ro/2664/uploads/24415781393.pdfIn PDF document text
    • http://kasargod.net/uploads/file/72873040655.pdfIn PDF document text
    • http://greaterdeliveranceministries1.com/clients/61527/File/60678997641.pdfIn PDF document text
    • https://branchennachweis.eu/userfiles/file/tekoworiwajaviru.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_off0000f513.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF513 10584 bytes
SHA-256: 0de34cdb8b5648732f3d66d1f03cef0882b0d501ec9cfe243dd8d6fa7cd85e13
font_01_sfnt_off00010d39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D39 17036 bytes
SHA-256: 54ba11b5b3a877a3333c511045a5ef618ba29e500d667859aae2f33e5e62ec5d
font_02_sfnt_off000139ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139CA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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