Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f9a570b1fbf9810…

MALICIOUS

PDF

125.5 KB Created: 2021-04-04 00:09:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 85cc29269854686e359f94cdfdef6fc8 SHA-1: 2068722ed70738b597902388b3d124285bd293ae SHA-256: 8f9a570b1fbf98101f170f2341adfe7aacd5ad892657e8db73925e99a4e6efbe
134 Risk Score

Malware Insights

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

The PDF contains an embedded URI that redirects to a suspicious domain, likely as part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to a search query, further supporting a phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://baarspo.ru/strik?utm_term=what+is+the+plot+of+pride+and+prejudice PDF link annotation
    • http://sidegut.22web.org/malicious_software_book.pdfIn PDF document text
    • http://lagepukoz.22web.org/radio_button_group_c_winforms.pdfIn PDF document text
    • http://sedovarubabozop.iblogger.org/tikigirupol.pdfIn PDF document text
    • http://labagokawiboze.22web.org/qualis_capes_2020.pdfIn PDF document text
    • http://vuwubuwo.22web.org/how_to_open_a_maytag_bravos_quiet_series_300_washer.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/7b801659-f7d2-455e-ab3f-ac8811039331/new_riders_of_the_purple_sage_song_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e64cbaa0-2454-4ec3-88f6-50ebea7e05e9/hoja_de_vida_ejemplo_de_perfil_laboral.pdfIn PDF document text
    • http://mexuzasapasi.rf.gd/so_neither_auxiliary_verbs_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/povodijirig/is_ahsoka_in_clone_wars_season_6.pdfIn PDF document text
    • http://pavunununege.epizy.com/football_game_free_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34f2e08a-11f1-48d2-93c3-ca8252c8b4fd/fascial_stretch_therapist_near_me.pdfIn PDF document text
    • http://tidukalimipeba.epizy.com/awadhesh_premi_new_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57452bde-3739-4098-9f43-f4561331c1c4/rosabunepixipanasepa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9802680-8659-4086-8eaa-b4e7516f1fc6/xojonibixob.pdfIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/13343846574.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a27b3396-1246-4538-80fa-2dc2de47f864/what_are_the_different_option_trading_strategies.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/dell_latitude_7490_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/carefusion_pleurx_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/231e186d-aa73-4344-b30d-1afc81b771c6/felsons_principles_of_chest_roentgenology_a_programmed_text_a_programmed_text_5th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/tonisefoteka/tixodakilazafol.pdfIn PDF document text
    • https://s3.amazonaws.com/tadevewuju/dell_latitude_e7450_charger_best_buy.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/litoxadaxisut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83920806-77f9-4d03-a181-818c8f4a051a/what_is_diverse_learning_programs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ce721ad-ec54-4298-94ac-a2aeb971faa5/does_james_allen_sell_lab_created_diamonds.pdfIn PDF document text
    • https://s3.amazonaws.com/jeponowon/xixofelakosebozukimuza.pdfIn PDF document text
    • https://s3.amazonaws.com/buwosevax/11799766769.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_off0001aecb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AECB 5332 bytes
SHA-256: 1addec72fb82a6de0a9c8466e3b6f90bf76f5868f76a2efd8a034851f5a663ad
font_01_sfnt_off0001c0fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C0FE 11644 bytes
SHA-256: c1a5778624f0cbe7dd1df455b04078bb688691661fe2b0d8d54e53ad595c2d1e

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