Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf7dd9bb3a7f9e7a…

MALICIOUS

PDF

75.9 KB Created: 2021-05-14 01:26:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 4943cce9dbab2597b10ebe3e624a0bcc SHA-1: 2edc4ebd0de630b1f58b1a6f9acc58c91bb0032e SHA-256: bf7dd9bb3a7f9e7a4d28537d8af108e29e8c98566093e7725c5e8e05dce5f9f8
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 0.9991

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://dugedepap.ru/strik?utm_term=krups+rice+cooker+rice+water+ratio PDF link annotation
    • http://vomoliba.scienceontheweb.net/66297270205.pdfIn PDF document text
    • http://podarokinsta.online/fiberiganigamili3e8kh.pdfIn PDF document text
    • http://ufenmac.com/xidaxukoturufulaxufesipvans8.pdfIn PDF document text
    • http://arthromedro.xyz/trainer_game_metro_2033_reduxah6aw.pdfIn PDF document text
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
    • http://1xbet-registrat.site/gewozez1fmlm.pdfIn PDF document text
    • http://trendmobile.ru/what_is_the_importance_of_a_hypothesis_in_writing_your_research_paper_brainlyem2ku.pdfIn PDF document text
    • http://vigastlens.xyz/15357102134pjw3h.pdfIn PDF document text
    • https://xatikofaf.weebly.com/uploads/1/3/0/8/130814669/8844572.pdfIn PDF document text
    • http://1cats.space/anthology_of_american_poetry1bwvb.pdfIn PDF document text
    • http://sufawevugut.mywebcommunity.org/lasebotetalomolad.pdfIn PDF document text
    • http://damvglaz6.xyz/dark_souls_2_best_early_faith_weaponbi35y.pdfIn PDF document text
    • http://khareedforosh.com/arabic_to_english_translator7sg6i.pdfIn PDF document text
    • https://zoxamadafipezo.weebly.com/uploads/1/3/1/1/131164297/jowonozaditetenavib.pdfIn PDF document text
    • http://levojefozaloro.mywebcommunity.org/instrument_of_accession_of_jammu_and_kashmir_state.pdfIn PDF document text
    • https://wexipemeb.weebly.com/uploads/1/3/4/8/134860193/jesudapa.pdfIn PDF document text
    • http://helpcreditscore.info/diccionario_espaol_larousse_gratisrkusb.pdfIn PDF document text
    • http://trells.space/98213151538uiidh.pdfIn PDF document text
    • http://eglo.club/43546568001319bn.pdfIn PDF document text
    • https://cdn.sqhk.co/bowevuva/cghhdWg/drink_bubble_tea_without_straw.pdfIn PDF document text
    • http://thecabinets.xyz/explain_human_resource_management_functiongf0mj.pdfIn PDF document text
    • http://idealsit.space/manuale_di_biblioteconomiadg23b.pdfIn PDF document text
    • http://mapugukabazewu.scienceontheweb.net/is_ben_10_alien_force_on_hbo_max.pdfIn PDF document text
    • https://cdn.sqhk.co/zuronenom/FwhiYii/reverse_speech_app_iphone.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://siniligavaxuvul.onlinewebshop.net/56752661213.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_off0000ebe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE1 5020 bytes
SHA-256: f4938af33842e1e65208f8f7abe558e73dc3ca8a2f65bf7d54c3efbc2e8802f5
font_01_sfnt_off0000fd1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD1A 10804 bytes
SHA-256: ae311f60c23d33fd7c9ef17f04d692d3530f1241036447a8c51a42398b4b813f

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