Malicious PDF — malware analysis report

Static analysis result for SHA-256 b89382ca3232c2b8…

MALICIOUS

PDF

88.5 KB Created: 2021-03-24 19:14:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 9402f5ad98ed26e4c115a5a24df5407a SHA-1: 8e0947aa0f3c17a08cb87c0b84bc118384d593f4 SHA-256: b89382ca3232c2b85a0c279834dcb5711b5bec5b6bf7b206a4517a07183b0502
66 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9991

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://pelibifir.ru/strik?utm_term=like+water+for+chocolate+book+movie PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382193/normal_603e4890e7f22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469359/normal_6059e76415b54.pdfIn PDF document text
    • http://vekisonoloze.sportsontheweb.net/4879059406.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409258/normal_6044ccc1b4414.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408864/normal_5fed9c4241684.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
    • http://jobizezum.epizy.com/adobe_acrobat_writer_free_download_for_windows_xp.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f49cebab-e5ec-40e8-8f7c-9db247566508/mndot_gravel_road_design.pdfIn PDF document text
    • https://ea29520f-fefa-4c12-ab21-0e0839e82572.filesusr.com/ugd/5d2047_208eb8e099054179ad2e2cc32157d14e.pdf?index=trueIn PDF document text
    • https://a6053a4b-6066-498d-92a8-7748b68531bc.filesusr.com/ugd/5f0d2f_a84eedc45be04b9d9220360eabfd44de.pdf?index=trueIn PDF document text
    • http://laxuzoto.onlinewebshop.net/1400432014.pdfIn PDF document text
    • https://528f6e5c-6927-42ef-b7a5-a8f9c349750c.filesusr.com/ugd/07b979_18bf0350ac084c4d94457015c04d515d.pdf?index=trueIn PDF document text
    • http://vafavesutabera.epizy.com/lodonanido.pdfIn PDF document text
    • http://sowinoto.epizy.com/resumen_pelicula_agora.pdfIn PDF document text
    • http://vepilezora.epizy.com/tamil_new_cut_audio_songs.pdfIn PDF document text
    • https://b18ac5c8-c825-4c59-a0a1-290c879ce4f6.filesusr.com/ugd/1a0fde_71070804d4094d2c92773e10f7209307.pdf?index=trueIn PDF document text
    • https://9ef77391-fdd1-48d8-ba15-364b07375333.filesusr.com/ugd/ebefdf_d855bc1ce3b14735ab7b90e052a4a3cb.pdf?index=trueIn PDF document text
    • http://rakorasalonolit.rf.gd/the_enjoyment_of_music_13th_edition_answers.pdfIn PDF document text
    • http://dasobiviwadodaj.atwebpages.com/learn_python_for_beginners_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67995a74-37a5-43a5-9f0c-895ec85ba83d/how_to_check_transmission_fluid_level_2010_honda_civic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2b0dda2-a60e-42a6-addd-479f1aff22c5/mouse_and_keyboard_recorder_crack_serial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb3478fc-2108-4aea-b107-7944decb51ab/nunujeru.pdfIn PDF document text
    • http://fatavetotujel.onlinewebshop.net/vienna_airport_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43951deb-0c42-44bb-aaef-870d67d4183f/76766432571.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_off00010e7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E7D 4924 bytes
SHA-256: bc17bdef4f4e9df3894d61fdaa23bd610535022a20e03fc5b1412a3230688872
font_01_sfnt_off00011f57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F57 11032 bytes
SHA-256: 0e5847eedb3ff483a730e2bb1f95167604f7c009ef6cf3e21c893e5d3b54c0e9
font_02_sfnt_off000144de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144DE 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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