Malicious PDF — malware analysis report

Static analysis result for SHA-256 89d0eb0a96f1aa8a…

MALICIOUS

PDF

82.3 KB Created: 2021-03-29 15:42:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e800febd9ede7175ddc0b7fc580e66ae SHA-1: 754439c36d871e856811972a77925c5853aa1199 SHA-256: 89d0eb0a96f1aa8a624f25f565538a0316f48a757c517b8e68b179a1dc813d9f
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 0.9992

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://vilenefex.ru/award?keyword=livro+biogeografia+e+meio+ambiente+pdf PDF link annotation
    • http://erkutungotu.com/on_green_dolphin_street_lead_sheet_ebyr494.pdfIn PDF document text
    • http://lemoxovuv.22web.org/inspection_form_excel_template.pdfIn PDF document text
    • http://mattelipsticks.site/schlage_electronic_locks_reviewt9wd7.pdfIn PDF document text
    • https://cdn.sqhk.co/xunijejozi/iOjbhgP/48709318010.pdfIn PDF document text
    • https://cdn.sqhk.co/dederubap/UgiDzgi/spotlight_room_escape_afterlight_floppy_3.pdfIn PDF document text
    • http://lolojividu.22web.org/solefikota.pdfIn PDF document text
    • http://trokot-shtorki.online/xopikufosikobajazbiz8.pdfIn PDF document text
    • https://cdn.sqhk.co/zirigajer/dgi3bhb/33258356321.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wibedubosateg/contrato_de_alquiler_departamento_amoblado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50077d7d-d3fe-4aff-85c2-f84a0261407f/33471072215.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/112d8945-7e84-4cb0-b8c3-38d0bac1b6ea/fios_remote_wont_change_volume.pdfIn PDF document text
    • http://xoxemofunox.epizy.com/dental_trauma_guidelines_2018.pdfIn PDF document text
    • https://e8b83640-91e4-44a0-a69f-c2468797902f.filesusr.com/ugd/ee4a13_9577e7a3c7644b37a9531971d3f6c535.pdf?index=trueIn PDF document text
    • https://510b81f6-be4e-4e40-9acf-3f60af495837.filesusr.com/ugd/5f226b_663a5f44bc214ea1a7a2e5ba85df5101.pdf?index=trueIn PDF document text
    • https://96a9e3af-f0c3-4048-9e6c-0ad8da3c6018.filesusr.com/ugd/15d534_780a56b274c54244889c76bf4448a9c2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8459e90c-be13-479e-a9be-d99920778514/will_cyberpunk_2077_be_fixed_on_xbox_one.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97e330ce-e981-48cc-9207-f3a90858a6e9/how_to_use_word_to_create_forms_fillable.pdfIn PDF document text
    • https://s3.amazonaws.com/zarevizebi/xbox_360_controller_charger_cable_price_in_pakistan.pdfIn PDF document text
    • http://bawofifudip.rf.gd/japugaledadusan.pdfIn PDF document text
    • http://tununik.epizy.com/irregular_past_tense_verbs_worksheet.pdfIn PDF document text
    • https://1a6c606f-1efd-495f-9370-57f425d809fd.filesusr.com/ugd/1be480_c82ac7c1b5e94501bc25ca7eddec30d0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/megujobemegor/14890181827.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/86872233558.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF201 5080 bytes
SHA-256: bb0252669a220ee88007e04f60d2ec62b19267e69bf3fff53ced9c3ac423e476
font_01_sfnt_off0001032c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1032C 13632 bytes
SHA-256: 94a5627f317a89a551d5516b6fab7565b832b84644c94342a484bd13872ffaf1
font_02_sfnt_off00012c09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C09 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333