Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf0434cd0e539d00…

MALICIOUS

PDF

84.2 KB Created: 2021-07-09 05:46:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: bd01156f1f7de086f600044e484a2caa SHA-1: a82c8ea0244f724a5bbbec516a505b616ead44d3 SHA-256: bf0434cd0e539d00a90a1d43c8ae97926af03e3c62045bc6a287a2758f75d5b8
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as a link farm, with many URLs pointing to compromised CMS upload directories. The ML classifier and ClamAV also identified it as malicious, specifically a phishing trojan. The embedded URLs suggest an attempt to redirect users to potentially harmful sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://oniceh.ru/uplcv?utm_term=into+the+wild+ending+summary PDF link annotation
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/3c0gpkj3up8rhl0tmq9t7ie1al/wikosunijijadefitoleje.pdfIn PDF document text
    • http://penzionriverside.cz/files/file/rerunawidilakazi.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d3e4151637---56175748567.pdfIn PDF document text
    • http://bptramptour.pl/files/file/76904299041.pdfIn PDF document text
    • http://shsalumniauditorium.org/clients/f/fa/fa32e32112b7cad64a7d7e78b95ed61b/File/lifumedumon.pdfIn PDF document text
    • https://clearpatth.com/userfiles/file/17518821054.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a22d1f1f149---goxipo.pdfIn PDF document text
    • https://internationalmedia.com/userfiles/file/6750890777.pdfIn PDF document text
    • https://ohcsi.com/ckfinder/userfiles/files/tulelalabewidopub.pdfIn PDF document text
    • http://arc-en-cielproduce.com/ckfinder/userfiles/files/67766411633.pdfIn PDF document text
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad638fdb3a5---tufidizifigulo.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160872368da3e4---23217214454.pdfIn PDF document text
    • http://giustizianuova.it/userfiles/file/74009484272.pdfIn PDF document text
    • http://nadiadsa.org/userfiles/file/sunaduzekelemefetowo.pdfIn PDF document text
    • http://av-jet.ru/userfiles/file/fififogutowitig.pdfIn PDF document text
    • http://stellamaris.cz/userfiles/wexeze.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c918b4d9dbd---damegojaretozogokisasolez.pdfIn PDF document text
    • https://chris-arnold.com/userfiles/file/40152523803.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a12932d941---lativili.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160a96dd6be60b---37965853619.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1607946718d2b3---megeworuwatu.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/16078419c97ad2---47626251857.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/66pui8i5jk657i38lguv1hvm6n/nasanozu.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/5e02ae505faa17ec5cdd694cfab61ad9/63427200694.pdfIn PDF document text
    • http://anhuicrew.com/upload_fck/file/2021-5-1/20210501200016676053.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_off0000e758.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE758 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ff6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF6F 10944 bytes
SHA-256: bed9533d6b097c4c937e73dc99b895cf1585754e9a7a7845e3d207bd2bddd8cf
font_02_sfnt_off00011871.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11871 16560 bytes
SHA-256: c6f1c38cce7f773d898ffba878968fed16e89c0fc9d3842f314a7766a90c1321

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