Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cadfa760eb62e82…

MALICIOUS

PDF

76.2 KB Created: 2021-03-01 10:13:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 00717eb0098ef87145ca8aa8fe910a06 SHA-1: 98d02e742ede9262bc0d69e95e57aaf80c32c98f SHA-256: 5cadfa760eb62e82945e91775bac9fd159d94e87b99a6a45a64dd84e24288d41
106 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. It uses a password-protected-archive lure. 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

  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://baarspo.ru/strik?utm_term=java+eclipse+gui+tutorial+7 PDF link annotation
    • https://cdn.sqhk.co/surikuzezun/wiheIgi/drill_down_game_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/nigulavax/Tidhjjd/narcos_cartel_wars_cheat_engine.pdfIn PDF document text
    • https://paxituzupinemof.weebly.com/uploads/1/3/5/3/135303349/rovupitiwure.pdfIn PDF document text
    • https://kolijegidixut.weebly.com/uploads/1/3/1/3/131379325/53d616ffce.pdfIn PDF document text
    • http://counterman.ru/what_helps_public_speaking_anxietywaqhu.pdfIn PDF document text
    • http://wodekenizowa.getenjoyment.net/vebakopuwojuwovifaneninid.pdfIn PDF document text
    • https://cdn.sqhk.co/naludibeg/fgeIia8/2591251821.pdfIn PDF document text
    • http://piwulag.sportsontheweb.net/what_is_the_cost_to_do_a_dna_test_in_jamaica.pdfIn PDF document text
    • http://cancandance.org/glaciers_ielts_reading_answerss0apu.pdfIn PDF document text
    • http://padigixatobezu.22web.org/boca_vs_river_copa_libertadores_2004_formaciones.pdfIn PDF document text
    • https://cdn.sqhk.co/zetanitanedo/jajiwif/wunozisujobem.pdfIn PDF document text
    • https://cdn.sqhk.co/sotisajen/ghgl9oj/summary_of_president_museveni_speech_today.pdfIn PDF document text
    • https://cdn.sqhk.co/raxuzuvuluf/ijjigMg/the_reversi_board_game.pdfIn PDF document text
    • https://cdn.sqhk.co/mokevesin/J7vibB3/islam_nagar_bhopal_map.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://suginuzebaluwom.rf.gd/election_card_form_6.pdfIn PDF document text
    • http://zonatitusajobo.onlinewebshop.net/spongebob_game_of_life_online_free.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_off0000ebd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD0 5228 bytes
SHA-256: 8e546c978fea655137b0389ef0fc6c71582216d17cca8f7aef17d248284f3425
font_01_sfnt_off0000fdb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB9 11116 bytes
SHA-256: b59df3e115a81102ddf2b6125d1afebc40024c65a1d521abfcad01533653c614

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