Malicious PDF — malware analysis report

Static analysis result for SHA-256 928b21fa30299acf…

MALICIOUS

PDF

61.3 KB Created: 2021-02-19 13:11:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 068130d9aebeae5055464a6d31f42f03 SHA-1: fac377f36a92bd5a949ed76a9743a0180c46d5a7 SHA-256: 928b21fa30299acfc9ad0aae23c23b85c27d7923e800ad588075008333a14bc2
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crophysi.ru/wix?keyword=henry+b+gonzalez+elementary+school+twitter In PDF document text
    • https://static.s123-cdn-static.com/uploads/4414169/normal_5ff8241f317a8.pdfIn PDF document text
    • http://republvinb.fun/biblioteca_nacional_de_francia_plataforma_arquitectura9vewg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369656/normal_5ffa4ef54c9bc.pdfIn PDF document text
    • https://manovofaripoluf.weebly.com/uploads/1/3/1/4/131453531/jexirub.pdfIn PDF document text
    • http://fesupopimos.66ghz.com/fasisewixovuvawu.pdfIn PDF document text
    • http://pomirkapa.site/888990820136bzg7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450724/normal_601f5594c66a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470835/normal_5fd91c4a20f3b.pdfIn PDF document text
    • http://bedating.online/additional_family_information_form_canadajqczz.pdfIn PDF document text
    • http://odemebayisitrafik.com/jorugozeleximidurek7lfco.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/woxewiwupir/connect_xbox_360_controller_to_windows_10_wireless.pdfIn PDF document text
    • https://s3.amazonaws.com/xugigabitulu/steam_workshop_mod_location.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 PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b58f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB58F 5560 bytes
SHA-256: 6e5f1001b146919a865390a9a3aaecb05014501d8bd45b252ad21a97f3929d20
font_01_sfnt_off0000c86e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC86E 9396 bytes
SHA-256: 643482c9ed118bdfced53249738c0d6c7b3bddf53e37337341f7a2052d8f129b