Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d46a07cb92bd204…

MALICIOUS

PDF

75.3 KB Created: 2021-03-05 15:23:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: a5fa91bb3b85123317a95122f71109e7 SHA-1: 9c18fbb4a3c5f0a0619e24a1140ac5e2b119f030 SHA-256: 4d46a07cb92bd2040363f2f1a81adf4331d7021369344b2bb4f869e1e4ca97cf
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, with one prominent URL pointing to 'golowaki.ru' and disguised as a search result for 'classic car wash near me'. This suggests a social engineering tactic to redirect users to a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://golowaki.ru/strik?utm_term=classic+car+wash+near+me PDF link annotation
    • http://gisoboxizaza.mygamesonline.org/data_structures_and_algorithm_analysis_in_java_3rd_edition.pdfIn PDF document text
    • http://wumomotetidofe.getenjoyment.net/curso_de_finanzas_personales_gratis_unam.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426816/normal_60039b03aca50.pdfIn PDF document text
    • http://wapadax.scienceontheweb.net/how_much_water_does_a_speed_queen_front_load_washer_use.pdfIn PDF document text
    • http://veruvipavopa.getenjoyment.net/to_the_sky_kingdom_pillow_book.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380383/normal_602dae4a7a734.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417305/normal_6012882cae189.pdfIn PDF document text
    • http://xatakafigudu.getenjoyment.net/49519121060.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474988/normal_60269832ce124.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367922/normal_5fdb36df33630.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/70337d35-7dff-4ee5-ac10-809c27a9881d/47324992003.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f45bebe-9d44-48c3-a110-c6b496713bb0/cant_open_karcher_steam_cleaner.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/jomowuxavinagiwitov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29578be1-3d92-43d1-8923-8f6dddac0691/how_to_remove_a_jammed_nail_from_a_porter_cable_nail_gun.pdfIn PDF document text
    • http://gozenabuzixi.onlinewebshop.net/xirizugizenurisuzanu.pdfIn PDF document text
    • http://subogerilazelo.atwebpages.com/que_es_dibujo_tecnico_urbanistico.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4eaf24ef-2e41-42fb-b708-a6fe76af6723/canon_mg3520_printer_driver.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/641d3571-b5d9-4bf6-8bb4-26599af1b287/paulo_coelho_quotes_in_portuguese.pdfIn PDF document text
    • https://s3.amazonaws.com/rikolesafuwofar/64754596106.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf71507c-d53f-4dda-9864-54122f0f6c1e/tiwolijor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b188260b-7066-41cb-8f70-7b3781ad4b40/warcraft_3_reign_of_chaos_cd_key_generator.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_off0000eb0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB0B 5036 bytes
SHA-256: c342e70bbd4226be2e907c3b173da39073d07310be11b2d94641a2f41b71c81e
font_01_sfnt_off0000fc07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC07 10392 bytes
SHA-256: b23f7fa29dd5d5489c096ba5514527eb938d4a670ef47b840ff47eabc62491dc

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