Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee1b0e343d9af5a1…

MALICIOUS

PDF

75.7 KB Created: 2021-03-18 23:00:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 686b2d6cff9ea631fe8063aaea53f242 SHA-1: 3922afb3859c84651427a8fdf4ed1bbd1c6d7a9d SHA-256: ee1b0e343d9af5a1eb3a09e26a078b2044f93c1349057b0362f3c3dcb471d866
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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 https://dafemum.ru/wix?keyword=super+mario+63+flash+game PDF link annotation
    • https://cdn.sqhk.co/wexunaveb/gjPw6as/mlb_standings_2020_playoffs_schedule.pdfIn PDF document text
    • https://cdn.sqhk.co/vizefejij/jF8RYg7/26995037950.pdfIn PDF document text
    • http://ing-cliente.com/medical_sign_in_sheet_template_freesafrz.pdfIn PDF document text
    • http://startbastar.online/7514749819iy5br.pdfIn PDF document text
    • http://tactical-jacket-sale.shop/wuvotivosasequpow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496013/normal_600c061c2900b.pdfIn PDF document text
    • http://jenewazajasazu.getenjoyment.net/91256978358.pdfIn PDF document text
    • http://buwovavozu.getenjoyment.net/sex_and_the_city_2_trailer_song.pdfIn PDF document text
    • http://good-production20.site/toefl_essay_structurezpf0c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412195/normal_5fcc55112252f.pdfIn PDF document text
    • http://inglassrus.ru/828294325103o71i.pdfIn PDF document text
    • http://gasurorir.sportsontheweb.net/17377189371.pdfIn PDF document text
    • http://sumapewub.getenjoyment.net/98196689689.pdfIn PDF document text
    • http://callipakk2.site/bowflex_ultimate_2_accessory_storage_rackj7fap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475563/normal_601cde3abfea3.pdfIn PDF document text
    • http://copyrightsupporteds.com/vojokamivasitijewu2e2r3.pdfIn PDF document text
    • http://nipizakevenuvis.scienceontheweb.net/navien_tankless_water_heater_venting_specs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478664/normal_60142dece2b56.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e4ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4EF 5736 bytes
SHA-256: 546fad404ea9787db73f60726be22e029915377f5737105f1ef925f99c3dd702
font_01_sfnt_off0000f849.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF849 11704 bytes
SHA-256: 664f150dc1f09a2596126e5fec46fd29154796f6b226311143c6ca93c3c69ace