Malicious PDF — malware analysis report

Static analysis result for SHA-256 5efef85e09cea1e9…

MALICIOUS

PDF

88.5 KB Created: 2021-03-07 23:33:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 06bbd0b70d802d852b10417cebe7abce SHA-1: 61efb20f37153bef5b5803fd6f210f995b4ff430 SHA-256: 5efef85e09cea1e94fb919c96337eb79382179c9a63f04c83e97c76a95aa9280
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a machine learning model and ClamAV, as malicious and likely phishing-related. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, appears to contain metadata related to PDF creation and potentially deceptive content.

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://druttle.ru/aws?utm_term=python+tutorial+with+examples+pdf PDF link annotation
    • http://nulatapukedu.scienceontheweb.net/visual_basic_6.0_tutorial_youtube.pdfIn PDF document text
    • http://zanakodus.22web.org/how_to_develop_android_application_in_python.pdfIn PDF document text
    • http://moradudipomibo.mypressonline.com/vatel.pdfIn PDF document text
    • http://davebamonuzove.medianewsonline.com/free_printable_venn_diagram_template_with_lines.pdfIn PDF document text
    • http://xufamorazogubov.sportsontheweb.net/2020_maserati_granturismo_mc_price.pdfIn PDF document text
    • http://jerimujolegem.medianewsonline.com/pld_high_school_cheer.pdfIn PDF document text
    • http://wolifote.getenjoyment.net/11157556820.pdfIn PDF document text
    • http://pigigozoruda.mypressonline.com/lexus_ls_460_specs_2008.pdfIn PDF document text
    • http://beviluxenumiliv.mywebcommunity.org/how_many_globally_have_died_from_covid.pdfIn PDF document text
    • http://zukoretevir.medianewsonline.com/bhagavad_gita_slokas_in_tamil_audio_free_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tirisesu.onlinewebshop.net/badger_5_1_2_hp_garbage_disposal_leaking.pdfIn PDF document text
    • http://litopuputorer.rf.gd/14916025321.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1f7cf23-3397-4f5d-94eb-bed73a1734c3/what_is_hot_briquetted_iron.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25ce3acd-f5ab-412d-b9ad-4c70ba4073de/gojojovukedib.pdfIn PDF document text
    • http://xoruxagejot.rf.gd/bernette_56_sewing_machine_manual.pdfIn PDF document text
    • http://mojozore.myartsonline.com/best_figure_drawing_book_for_beginners_free_download.pdfIn PDF document text
    • http://naxesabefadufu.atwebpages.com/battery_tender_junior_800ma.pdfIn PDF document text
    • http://nolumuj.epizy.com/ibm_cognos_tm1_installation_and_configuration_guide.pdfIn PDF document text
    • http://peruroz.onlinewebshop.net/79783154003.pdfIn PDF document text
    • http://jeborawaleko.atwebpages.com/english_vocabulary_in_use_elementary_cd-rom.pdfIn PDF document text
    • http://favuzokusom.rf.gd/pulurugekuk.pdfIn PDF document text
    • http://sezajebufixi.epizy.com/how_to_turn_a_bedsheet_into_a_toga.pdfIn PDF document text
    • http://polebofoxajiras.rf.gd/75858372952.pdfIn PDF document text
    • http://katakamubu.rf.gd/altivar_12_user_manual.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_off00011d7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D7A 5544 bytes
SHA-256: e5ace367cd4e1ff65a4f74e248eead06568bcfce8ae40cbe59ad54fb788a7501
font_01_sfnt_off00013048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13048 10580 bytes
SHA-256: 74d1dbcf5b0ec151687f895e958b2c0c7701aacb5042c9755728c1bdfaf91b4d

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