Malicious PDF — malware analysis report

Static analysis result for SHA-256 552178e1fb4223e0…

MALICIOUS

PDF

67.9 KB Created: 2022-03-31 02:54:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-05-20
MD5: a6b5266cc035e246f78d27e083d871d6 SHA-1: ef90d12a85313d28db020d4c1537b8b1454cc626 SHA-256: 552178e1fb4223e0890bed07176f67d90585b57f704d11e298e3a6f1c3da66c6
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://yugang360.com/upload_fck/file/2022-2-7/20220207090718893475.pdf In PDF document text
    • https://actorconseil.com/files/file/wubil.pdfIn PDF document text
    • https://www.insideaccess.lk/assets/js/kcfinder/upload/files/50903600234.pdfIn PDF document text
    • https://giliruba.weebly.com/uploads/1/3/1/4/131483170/6928543.pdfIn PDF document text
    • http://archive-2011.humandoc.pl/attachments/file/bofamuf.pdfIn PDF document text
    • https://deremufirig.weebly.com/uploads/1/3/4/8/134854029/5174778.pdfIn PDF document text
    • http://temple.mo/userfiles/file/1386034442.pdfIn PDF document text
    • https://nopewiviguzine.weebly.com/uploads/1/3/1/1/131164125/888cf9deb0.pdfIn PDF document text
    • https://jung.su/kcfinder/upload/files/sovatovaxidikajan.pdfIn PDF document text
    • https://emilline.dk/ckfinder/userfiles/files/11682004189.pdfIn PDF document text
    • https://lupogupep.weebly.com/uploads/1/3/4/4/134444844/genenojajawipa.pdfIn PDF document text
    • https://soudurelausiere.ca/upload/editor/file/17002044982.pdfIn PDF document text
    • https://venubitolaxi.weebly.com/uploads/1/3/4/3/134372432/0dcd8f7215.pdfIn PDF document text
    • https://bewosugug.weebly.com/uploads/1/3/0/8/130814774/tikadovegizujen.pdfIn PDF document text
    • https://telonilinip.weebly.com/uploads/1/3/6/0/136050587/lugofowek.pdfIn PDF document text
    • https://residencialparquenorte.es/kcfinder/upload/images/files/46279466222.pdfIn PDF document text
    • https://jejojoroliwe.weebly.com/uploads/1/3/4/3/134310913/3175803.pdfIn PDF document text
    • http://huabulaw.com/uploadpic/2022-3/file/2022031710054673499.pdfIn PDF document text
    • https://yoyep.co.za/YmrXLWy8?keyword=keurig%20k60%20filterPDF 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_off0000a78f.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0000a78f.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a78f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA78F 10308 bytes
SHA-256: 088cc87bf5f905d2e7d256e1607b5a868778eee8e7567a3e71ccbc4410468ce4
font_01_sfnt_off0000bef0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEF0 16652 bytes
SHA-256: a3d90f63327cf711980f898edbd528482abdebb101689bdbfc8518571d30d040
font_02_sfnt_off0000ea4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA4F 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336