Malicious PDF — malware analysis report

Static analysis result for SHA-256 3adfb7a9d2c7dde3…

MALICIOUS

PDF

79.8 KB Created: 2021-03-25 04:33:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 4126b74bc78937ecd158c6ab1d12dc3a SHA-1: add74f083963cb51873e67fe3fdd4dbbedb0a1c3 SHA-256: 3adfb7a9d2c7dde35de7e071661fb7f3ee9d1aa11e8cfa9f01c85cc5431b97bc
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document, potentially leveraging JavaScript for redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://kuzutuzo.ru/award?keyword=mapa+casa+de+campo+madrid+pdf PDF link annotation
    • http://marketitaly.info/observation_inference_worksheet_middle_school9o76h.pdfIn PDF document text
    • http://picply.ru/75280921649pjbkj.pdfIn PDF document text
    • http://ledimpress.biz/xexavarud43edy.pdfIn PDF document text
    • http://lozhobelir.space/webekevinogulibiwfm7g.pdfIn PDF document text
    • http://maximizator.xyz/pinball_z_windows_xp_play0sfad.pdfIn PDF document text
    • http://ita-bio.space/zofelubisuwalidemqxt77.pdfIn PDF document text
    • http://slamelina.website/android_9_para_zenfone_4_selfie8gket.pdfIn PDF document text
    • http://pefujogori.iblogger.org/zupigin.pdfIn PDF document text
    • http://gajonedorebuko.mywebcommunity.org/arquitecto_definicion.pdfIn PDF document text
    • http://scandisvet.ru/how_to_program_optimum_remote_to_element_tvbross.pdfIn PDF document text
    • http://maturibcgj.space/excel_de_hcreye_smayan_yazuv8mi.pdfIn PDF document text
    • http://ritikutoxukor.22web.org/health_o_meter_glass_scale_reset.pdfIn PDF document text
    • http://barashik.space/51750604399a35ye.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/5a42e2a2-d748-4b70-a627-14f3cfc4a99a/journey_to_the_west_the_demons_strike_back_full_movie_in_hindi_online_watch.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/android_box_for_tv_use.pdfIn PDF document text
    • https://s3.amazonaws.com/jonora/67416833049.pdfIn PDF document text
    • http://natukifuza.atwebpages.com/autosar_interview_questions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f9f05cf-0298-45a9-9bb5-a892688ca0e5/catch_me_if_you_can_movie_online_free_watch.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/read_vcf_file_android_programmatically.pdfIn PDF document text
    • http://lufiwivumijej.myartsonline.com/zogoxivafote.pdfIn PDF document text
    • http://fuxunowelujuxa.atwebpages.com/scott_pilgrim_vs_the_world_game_pc_release_date.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_off0000f5df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5DF 5276 bytes
SHA-256: 660c65c486f3e1976da624ad64a9740e082389102cdd899c1843448ce4da3ffb
font_01_sfnt_off000107c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107C1 12544 bytes
SHA-256: 0bcfe2860e4f26b179fe290805fd2a9cdde28bfc811b29091e56b5df081bcd60

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