Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbd37a35ae9e67e7…

MALICIOUS

PDF

75.9 KB Created: 2021-03-01 06:33:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: b6541b41a0ab8f6883ed4ad45ba68c9d SHA-1: c1b64032c19a55908c973e72e8b60855ea0cf88b SHA-256: cbd37a35ae9e67e7bbbc4d9ed451607b548e2361f53a79fe685b89002ab798a5
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://ponafet.ru/award?keyword=who+are+marginalized+groups%252Fcommunities+in+pakistan PDF link annotation
    • https://saximomedu.weebly.com/uploads/1/3/2/7/132740398/3841285.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379726/normal_60144c9ace118.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470703/normal_5fe8b4986ba90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454682/normal_6019a11fa3c80.pdfIn PDF document text
    • https://cdn.sqhk.co/vavefamixivi/hRgdOij/1941_world_war_strategy_apk_mod.pdfIn PDF document text
    • http://rurokewe.iblogger.org/street_fighter_android_apk_data.pdfIn PDF document text
    • http://fijubigatusurov.scienceontheweb.net/beethoven_spring_sonata_sheet_music_violin.pdfIn PDF document text
    • https://koreperuk.weebly.com/uploads/1/3/2/6/132680900/kamijidevifa-tirajagurapa.pdfIn PDF document text
    • https://cdn.sqhk.co/kewusikata/jd5AmTR/59927752410.pdfIn PDF document text
    • https://cdn.sqhk.co/nowonipewo/FnGjdig/best_children_s_books_2020_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/tutogalubete/SkibW3W/the_freebie_movie_watch_online_free.pdfIn PDF document text
    • https://cdn.sqhk.co/dujagazatad/jIDlcic/betasidimomujegel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zatuvejamubolo.atwebpages.com/puerto_rico_main_dish_recipes.pdfIn PDF document text
    • http://xilijimerufosat.rf.gd/67026660330.pdfIn PDF document text
    • http://kipejefanowisu.atwebpages.com/what_is_the_definition_of_reflective_writing.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_off0000ec1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC1F 5648 bytes
SHA-256: f7dee70c5d9151edab44fc2c465970e0f5fc7873ce2ca0a3751fd93257f7ce5b
font_01_sfnt_off0000ff48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF48 10340 bytes
SHA-256: 0dd337c3fb6353c8726a54c8589ff156ce55e1b66111a8c4860eda53158424ae