Malicious PDF — malware analysis report

Static analysis result for SHA-256 c76e436725e5f024…

MALICIOUS

PDF

73.1 KB Created: 2021-03-06 18:05:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 305912e979c00ad5c81204746a0a039c SHA-1: 4f61e9c517b2a60287e587ce41e3ead815119fe7 SHA-256: c76e436725e5f0241eeede96fca52c54a7cbe38e6e8a698306fbc81e3aa38a98
66 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. 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 0.9993

Heuristics 4

  • 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://midufefew.ru/wix?keyword=alphafriends+song+a-z PDF link annotation
    • http://lnstagaram-verifiedbadges-from.com/spectrum_tv_code_s0900maqqg.pdfIn PDF document text
    • http://viwiwasuzozu.22web.org/the_real_christmas_book.pdfIn PDF document text
    • http://kino-vezde.ru/775720239327jy44.pdfIn PDF document text
    • https://cdn.sqhk.co/wotinobeb/VjeJagd/1562578806.pdfIn PDF document text
    • https://cdn.sqhk.co/kedilexele/hi4rje0/sdgs_in_action.pdfIn PDF document text
    • http://epipog.com/18425905532mu6yf.pdfIn PDF document text
    • https://cdn.sqhk.co/molivovuki/ibHRhis/zenuzedikub.pdfIn PDF document text
    • https://cdn.sqhk.co/zavipudajose/gsgcK3j/tie_dye_patterns_using_rubber_bands.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sowitid.epizy.com/1_factor_that_contributed_to_the_end_of_the_open_range_and_or_cattle_drives.pdfIn PDF document text
    • http://xugowosapiri.rf.gd/15403194201.pdfIn PDF document text
    • http://faxunarin.epizy.com/zekomapexezuv.pdfIn PDF document text
    • https://c7bff75e-0a19-4817-9d47-fca4cf08161b.filesusr.com/ugd/3b6424_4e011959d1354a3d995bf3c6d2446451.pdf?index=trueIn PDF document text
    • http://xizilagitakov.epizy.com/google_spreadsheets_api_c.pdfIn PDF document text
    • https://5e73d190-47a4-4ead-99bf-7e9069f06a16.filesusr.com/ugd/55cc32_f937fe2bb94247a78cdda8ed54fc29e6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jiwisi/company_daily_expenses_excel_sheet.pdfIn PDF document text
    • https://d4078116-a2d5-466f-97e6-20d899f6ca30.filesusr.com/ugd/576447_025c477201ff4bb09614f907a8d6f5c1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/brother_ls_1520_sewing_machine_parts.pdfIn PDF document text
    • http://fixelelediv.epizy.com/99258221868.pdfIn PDF document text
    • http://xenilesaripesu.epizy.com/game_of_thrones_book_2_plot.pdfIn PDF document text
    • http://dudulexo.epizy.com/razoguxezega.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/xumowibuguxuwep.pdfIn PDF document text
    • https://77bc4ea4-de20-41c0-a463-a5315db628d9.filesusr.com/ugd/2c69e3_9419454917994085b61b834fcdd5990f.pdf?index=trueIn PDF document text
    • https://b354d503-40d1-4c97-84b4-bc0b16c12f35.filesusr.com/ugd/8c7d07_95c9601723bf4a4d971bd90f91a91e40.pdf?index=trueIn 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_off0000e0e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E8 5372 bytes
SHA-256: 289ecc37fa847b048d34b3c17f03baef52da6e9b54a79b9b50aa247571d82a53
font_01_sfnt_off0000f33c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF33C 10412 bytes
SHA-256: 5c19458dc18c6c861825473c66b1ad11d8ff730c13053e2bbcc65f3cf1049d72

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