Malicious PDF — malware analysis report

Static analysis result for SHA-256 c959b4ef9c70cc12…

MALICIOUS

PDF

90.4 KB Created: 2021-03-22 18:41:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: ad7d15b26c9b395e9ce3aa4f0e13b43e SHA-1: 5b27318c1f644e003bd779cd17a1b9daccf835c5 SHA-256: c959b4ef9c70cc12782d76a16685dee0c8a7636616d5afcf0cc7ac52f87f74bd
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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://ponafet.ru/strik?utm_term=is+nico+di+angelo+in+the+dark+prophecy PDF link annotation
    • https://cdn.sqhk.co/dudavizi/ZnhbQob/zufikuposowizetug.pdfIn PDF document text
    • http://mifirejetevina.getenjoyment.net/43566466642.pdfIn PDF document text
    • http://xidakuxekon.22web.org/what_is_the_difference_between_programme_planning_and_project_management.pdfIn PDF document text
    • https://cdn.sqhk.co/rutunidosaw/gghbGRM/2019_iihf_world_championship_winners.pdfIn PDF document text
    • http://pudirexuzil.iblogger.org/callus_formation_on_broken_bone.pdfIn PDF document text
    • http://sigisuzuk.getenjoyment.net/v_for_vendetta_free_movie_download_mp4.pdfIn PDF document text
    • http://dufifudusimube.mygamesonline.org/export_text_messages_from_iphone_backup_to.pdfIn PDF document text
    • http://pawomodom.medianewsonline.com/national_geographic_magazine_files.pdfIn PDF document text
    • https://cdn.sqhk.co/tedigedubemi/jacj1aK/border_crossing_restrictions.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f65385ec-f5fa-4656-a753-7d96fb6b4d1c/wogudevenawulinerof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f5dbc48-bd01-4cbc-ac6d-a2d00a517ae6/zupuribudi.pdfIn PDF document text
    • http://vivetusukuv.onlinewebshop.net/praise_and_worship_piano_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dd149da-1606-4692-8d09-22eb39964532/99344493420.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/631c233f-4d24-4d61-8d48-c24fd41eafbf/3156889196.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecb6595c-19b1-4552-ac21-c856c0fdab0c/bojari.pdfIn PDF document text
    • http://jefebewo.epizy.com/fodisozimowuzazow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e80e9d7b-4952-4edd-96b3-e9ba48dfbf34/the_rack_workout.pdfIn PDF document text
    • http://sezajebufixi.epizy.com/prime_video_apk_for_tcl_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fc6fd57-aad0-443f-8d6d-53e5d8709ca6/200_verbos_regulares_en_ingls_presente_pasado_y_participio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdaf8a8e-1b6c-4878-a8d2-e6776caf003e/sezisekitoxe.pdfIn PDF document text
    • http://weniwotazemomin.rf.gd/bpc_full_form_in_gas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e6eea50-6653-4992-911e-a9d98f2068bb/how_to_become_a_special_needs_assistant_in_ireland.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d93fa982-6d03-4254-8f13-40385991e483/42625567118.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_off000123f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123F6 5436 bytes
SHA-256: a4e742de4391395677482abc2b2962c714842926f4750ccc68335621692d2c02
font_01_sfnt_off00013674.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13674 10888 bytes
SHA-256: b8128e830adf71f0c157a7057b32301c4485358b8c368fbfbff14efb3d51a478

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