Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f1a73fc17a2d0b3…

MALICIOUS

PDF

72.4 KB Created: 2021-02-19 02:32:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: e042901d5ed2bf94494932b7b092f30e SHA-1: 950d515a2258071f4937cd17d68c6e8dbf6c3214 SHA-256: 1f1a73fc17a2d0b3dab44017284a45b3c8c3d4ae83a84d88c0512e3da3d44da7
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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=pokemon+black+2+all+tms+code In PDF document text
    • http://rakajipof.22web.org/bypass_proxy_android_mobile.pdfIn PDF document text
    • https://cdn.sqhk.co/guwuweri/gagcZgd/47228973783.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380223/normal_5fee957791af9.pdfIn PDF document text
    • https://cdn.sqhk.co/dusaradezat/j2HheBp/32315891081.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490252/normal_60225ec287cc2.pdfIn PDF document text
    • https://cdn.sqhk.co/purorelaz/c3hgc3e/amc_movies_tonight.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410015/normal_5ff4a96e4a382.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402032/normal_5fea146d5d45e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391013/normal_600e30acca209.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443814/normal_6004cc8608cee.pdfIn PDF document text
    • https://cdn.sqhk.co/zidexamuwela/ib9EhaC/wavizavemikoz.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/murudute/nergies_renouvelables_algrie.pdfIn PDF document text
    • https://s3.amazonaws.com/wizakokowe/school_supplies_matching_worksheet.pdfIn PDF document text
    • http://poposumezaxek.rf.gd/23012047461.pdfIn PDF document text
    • http://lokuvutifinulef.rf.gd/lindsey_stirling_christmas_c_mon_sheet_music.pdfIn PDF document text
    • http://zenejifawulo.epizy.com/worksheets_five_kingdom_classification_system.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_off0000ddae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDAE 5324 bytes
SHA-256: 8cccf051592846d31bbf82f41beab4403a8166b3c62b8ea4b011acb2d097fc9a
font_01_sfnt_off0000efbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFBC 10800 bytes
SHA-256: 8256ef5d0b3af47936828404b079567f45e4ca001f3e6100ccafe48fd2387d05