Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a310a3aa1554d2a…

MALICIOUS

PDF

65.4 KB Created: 2020-12-25 10:03:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-04-14
MD5: 427ca7de2e715550110f198b32836a00 SHA-1: e426f0bf619e5299a632387ebd345fcace52367e SHA-256: 5a310a3aa1554d2af74ddd37caa5aa5125580548ac98824ce3040376a0e2fcdb
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://trafffi.ru/123?utm_term=persona+3+elizabeth+social+link In PDF document text
    • https://static.s123-cdn-static.com/uploads/4467004/normal_5fe50ab95eba6.pdfIn PDF document text
    • https://budamasut.weebly.com/uploads/1/3/4/9/134903336/6587022.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500417/normal_5fd3c077341d8.pdfIn PDF document text
    • https://cdn.sqhk.co/fakobijo/PhegikB/cheats_for_mortal_kombat_x_xbox_one.pdfIn PDF document text
    • https://gixujadimi.weebly.com/uploads/1/3/4/7/134708567/8bcf7c0b7ade70.pdfIn PDF document text
    • https://s3.amazonaws.com/lodunixodetum/weekly_scheduling_templates_free.pdfIn PDF document text
    • https://letitelow.weebly.com/uploads/1/3/4/5/134500939/8378ce739.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454984/normal_5faa5921d26c8.pdfIn PDF document text
    • https://sivagodumojuji.weebly.com/uploads/1/3/4/2/134235915/da9af3.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000c6e1.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000c6e1.bin)
    • https://uploads.strikinglycdn.com/files/6669d9cf-6429-4558-97a6-e5966f749352/91024589898.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/239e7002-19f6-49db-81c1-6afa8b826b64/squirrel_mysql_driver.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e64ecf63-de91-4a99-90d3-c6a4737cf9cc/davefubi.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://scripts.sil.org/OFLIn extracted file (font_00_sfnt_off0000c6e1.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c6e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6E1 5308 bytes
SHA-256: 43a5f1fa8d50dfef64928e8b32879f4905173d2a12d9ee2b00df0634cece7699
font_01_sfnt_off0000d8eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8EB 9316 bytes
SHA-256: 304119aef2a8bb6672254cc459c30776bc750ade36914f0dfa20a7591102402b