Malicious PDF — malware analysis report

Static analysis result for SHA-256 b61f5b376e6738e0…

MALICIOUS

PDF

85.9 KB Created: 2022-04-02 17:48:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-07-15
MD5: 99dc54c95638033431b3c7aa92ae3598 SHA-1: ad1d1ba8465900c8a6543ccd085ca6e68fb2f8d2 SHA-256: b61f5b376e6738e06fee7f2bc0cd4dd8788ebcafb229693e94cc101e376247c3
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://zoekidsworld.com/userfiles/file/15615231868.pdf In PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/1623142c495347---wevalesusasabafiluledal.pdfIn PDF document text
    • http://wogo.net/data/wogo.net/uploadfiles/file/85791386172.pdfIn PDF document text
    • https://sutujiwujuso.weebly.com/uploads/1/3/5/3/135390810/7040748.pdfIn PDF document text
    • https://joleziravakejar.weebly.com/uploads/1/3/4/4/134460301/4728194.pdfIn PDF document text
    • https://wevofuru.weebly.com/uploads/1/3/4/6/134670173/657c9.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/16247b92584d83---nudur.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1621373b6f1903---begobedoro.pdfIn PDF document text
    • http://knowleangling.co.uk/ckfinder/userfiles/files/20185019862.pdfIn PDF document text
    • http://jodhpurheritagewalk.com/images/file/jevolinezepapesitisonizip.pdfIn PDF document text
    • http://airelimpio.mx/img/editor/file/wumojilobufagudegejib.pdfIn PDF document text
    • http://abbeytraining.net/userfiles/file/4017937722.pdfIn PDF document text
    • http://onestep-tokyo.com/userfiles/file/rimopapuwutukabebemirux.pdfIn PDF document text
    • http://pinboulevard.com/file_space/files/28137616932.pdfIn PDF document text
    • http://kolkandkolkdesign.com/site/data/ws/files/nilepomudom.pdfIn PDF document text
    • http://tenfci.net/userfiles/file/8535897222.pdfIn PDF document text
    • https://seeyounow.net/userfiles/file/20921740266.pdfIn PDF document text
    • https://lovig.co.za/YmrXLWy8?keyword=genesis%202%20esv%20bible%20gatewayPDF 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 extracted file (font_00_sfnt_off0000ed4d.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0000ed4d.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED4D 17164 bytes
SHA-256: b6f438e86059ed715592d3321785182f00a5143a7e1cfa5ad0ebbfecb9032005
font_01_sfnt_off000119d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119D4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000131eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131EB 10628 bytes
SHA-256: 27580e56606e8e5a4baf8405d5a4c45879f93ce87f59b215273cfbe02abb9651