Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2758a3d4e206db8…

MALICIOUS

PDF

78.7 KB Created: 2021-03-31 08:02:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 14994f8d4fd345297b52a110b21f8c86 SHA-1: 1392a0a542c088c7cfd9aec068326fee2e59fafa SHA-256: e2758a3d4e206db8ae38b3a24cb9824b10212d9b7b3cdcbb810138333e57c25d
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 0.9996

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://xajibur.ru/strik?utm_term=how+to+clean+lasko+ion+tower+fan PDF link annotation
    • http://hookup158.fun/mossberg_500_forend_change1x4dy.pdfIn PDF document text
    • http://soldatskaya6.ru/dr._jekyll_and_mr_hyde_difference_between_movie_and_bookrhs36.pdfIn PDF document text
    • https://cdn.sqhk.co/gedodupem/bih4HUQ/fidediwedosimifuxorav.pdfIn PDF document text
    • http://ribadubeko.scienceontheweb.net/el_aquelarre.pdfIn PDF document text
    • https://cdn.sqhk.co/vajegipofuz/e6ihfhd/fegovaminafowijiwotatowet.pdfIn PDF document text
    • https://cdn.sqhk.co/xogudililavo/gfI3ahc/white_noise_lite_play_in_background.pdfIn PDF document text
    • https://cdn.sqhk.co/sirigibi/hajaQje/twitter_video_er_apk_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/jutepoxof/azDxjgJ/geboledebutekepixirajuz.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/336f6bf8-3843-41cc-aac4-3b5448ae75b2/25215252120.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbb1ba6b-b665-4bd5-8907-8335ee11d9f9/uppababy_vista_rumble_seat_jordan_2018.pdfIn PDF document text
    • http://zudupaxub.myartsonline.com/physics_principles_and_problems_study_guide_answers_chapter_4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d114cc4-5d81-4961-a0f5-c04990be76c7/the_revenant_movie_poster.pdfIn PDF document text
    • https://s3.amazonaws.com/dutuzanob/arya_songs_malayalam_free.pdfIn PDF document text
    • https://s3.amazonaws.com/verirejon/yahoo_answers_best_pick_up_lines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cec41018-ffe9-453d-a004-4ab9091c65ad/how_to_reprogram_a_garage_door_opener_remote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35d85538-6610-4ac0-bb7e-b309dd30a0fc/bigajizis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d03b3947-ea43-49de-a80e-0fd5ce5cedb1/what_is_the_zone_of_proximal_development_give_an_example.pdfIn PDF document text
    • http://zubiluwetij.myartsonline.com/greek_mythology_titans_and_their_powers.pdfIn PDF document text
    • http://wawikoduvebakap.onlinewebshop.net/protein_structure_analysis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07b6e9f1-033b-490b-864a-f91e046266be/rita_hayworth_and_shawshank_redemption.pdfIn PDF document text
    • https://s3.amazonaws.com/bubisifapagefe/bhojpuri_gana_hd_video_2019.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_off0000f8c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C8 4992 bytes
SHA-256: 9a954fc8d4e1483b6b45bac60bc77d72bee0e341a7d7e3785dacfaba3f0b3046
font_01_sfnt_off000109e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109E3 10496 bytes
SHA-256: dee2d402fdfdeae6587ee9c57a2c8286cb895cdc8381cd02837985b0d1a124fe

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