Malicious PDF — malware analysis report

Static analysis result for SHA-256 11cf5f437456bf7b…

MALICIOUS

PDF

78.6 KB Created: 2021-04-02 13:35:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: fadd48ef090026c54b54fcf160482bf5 SHA-1: 5b04e0d4235b796044d41c543c0f62c944c5ccac SHA-256: 11cf5f437456bf7bd4e3e847bebd08143b2e1f3101f8df2044a217003d081fcf
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains an embedded URI pointing to a suspicious domain, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains metadata related to advertising and PDF generation, likely serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jumiwimov.ru/123?utm_term=advertising+pdf+noun PDF link annotation
    • https://cdn.sqhk.co/tedalome/ghihghg/zemojofobizebig.pdfIn PDF document text
    • https://cdn.sqhk.co/ferobisuw/Ahggeic/detective_conan_live_action_movie_cast.pdfIn PDF document text
    • https://cdn.sqhk.co/vipabure/6HtggTD/jagafene.pdfIn PDF document text
    • https://cdn.sqhk.co/wodelaganav/cd21x5Y/92226239701.pdfIn PDF document text
    • https://cdn.sqhk.co/kevamubeminu/dgykzqJ/popular_black_men_s_haircuts_2018.pdfIn PDF document text
    • https://cdn.sqhk.co/xubupigegi/egjgdjc/8907362874.pdfIn PDF document text
    • https://cdn.sqhk.co/xuwifoviwalo/ZgeP9LF/make_ice_cream_in_a_bag_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/tajudozizif/igijdDf/pocket_league_story_2_skills.pdfIn PDF document text
    • https://cdn.sqhk.co/reriwoduriju/eNEjaii/boat_drive_in_movie_los_angeles.pdfIn PDF document text
    • http://jofipifemu.medianewsonline.com/the_tibetan_book_of_the_dead_full_movie.pdfIn PDF document text
    • https://cdn.sqhk.co/fanabezom/ibOrBic/up_board_intermediate_result_2014.pdfIn PDF document text
    • https://cdn.sqhk.co/goronikel/bhdWjz4/dino_war_rise_of_beasts_mod_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/wemerofada/2hfgdqa/fox_girl_anime_wallpaper.pdfIn PDF document text
    • https://cdn.sqhk.co/jusupovexewa/KsnqXgg/tumipuvugedom.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/2e3d7668-8da7-4d65-9f13-7ab87c0c7366/merkur_safety_razor_and_brush_stand.pdfIn PDF document text
    • http://xabudavadeguvo.myartsonline.com/albergues_camino_de_santiago_frances.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9dd02ed4-c9ae-4bc5-914c-ee8a69e97310/evcon_furnace_code_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b6a1e64-d3d4-4fe2-9c0a-4a89bbdccca2/dewalt_3400_psi_pressure_washer_unloader_valve_adjustment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e4b55c4-8ac4-472a-a730-5d4b6006475d/infinix_note_7_price_in_bangladesh_6_128.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9cfa57a-65ac-425e-89f6-797d386742df/ropivebeja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/762b74f3-ac00-46da-8cd3-e8e8f25368dd/kemixuzud.pdfIn PDF document text
    • http://nofolimuri.myartsonline.com/english_literary_devices.pdfIn PDF document text
    • http://weponigonimogo.myartsonline.com/gixuvajifonogubanimemi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92fd8283-cf87-441f-b43d-953d1762efcd/toro_recycler_20334_self_propelled_mower.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c120e45-ec4b-4c9a-a3f9-d4a82875c62c/5969709978.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_off0000f2bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2BD 5016 bytes
SHA-256: e5b5673417440849e02be6f798ffc967f1726550b33a98a5c71de0323962d98f
font_01_sfnt_off000103ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103EA 11548 bytes
SHA-256: ed20dad4ccc771ed6a1888eaafeba403410b7077a5ed292cfc637f15c86a82c3

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