Malicious PDF — malware analysis report

Static analysis result for SHA-256 57c0be7f8d0b0220…

MALICIOUS

PDF

92.9 KB Created: 2021-03-15 04:39:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 7bbc33c9fa348c94ae838811235f69eb SHA-1: b07d8bd7502deb9185b368e848017c20e3a2b48c SHA-256: 57c0be7f8d0b0220561c2165aca09b5186f096ce6c46eef767a5f1b060b4f956
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a quiz related to the urinary system. This is a common social engineering tactic to disguise a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lead the user to a malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://zajinet.ru/wix?keyword=urinary+system+diagram+quiz PDF link annotation
    • http://vadosaj.getenjoyment.net/the_lowest_animal_by_mark_twain_sparknotes.pdfIn PDF document text
    • http://crubr.space/54359514205e0wiy.pdfIn PDF document text
    • http://rinusiwujegabu.medianewsonline.com/30197464863.pdfIn PDF document text
    • http://arfeshome.com/bach_air_violin_sheet_music6z2j6.pdfIn PDF document text
    • http://film123watch.com/teporalexujewes8e6yd.pdfIn PDF document text
    • http://nageramuvepom.mywebcommunity.org/manual_cardo_scala_rider_q3_espaol.pdfIn PDF document text
    • http://levupag.22web.org/brownian_movement_2010_movie.pdfIn PDF document text
    • http://lubenoredeji.mypressonline.com/how_to_get_z_table_on_calculator.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ritumogadoj.onlinewebshop.net/xopugenevisome.pdfIn PDF document text
    • http://xetulugesoboko.epizy.com/tedagis.pdfIn PDF document text
    • https://s3.amazonaws.com/potamotaz/school_psychology_case_study_examples.pdfIn PDF document text
    • http://titopamut.epizy.com/60658614939.pdfIn PDF document text
    • https://s3.amazonaws.com/wiremeresegikon/35397646488.pdfIn PDF document text
    • https://s3.amazonaws.com/zarevizebi/scratch_2_for_linux.pdfIn PDF document text
    • https://s3.amazonaws.com/pegozegi/vexanewofobaxikinuv.pdfIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/jovobutezozovojunopov.pdfIn PDF document text
    • https://s3.amazonaws.com/wovugi/jemavejefekubev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bdeca2d-98dd-4c42-8f5b-64b90607b416/kaxebuwemabijoguj.pdfIn PDF document text
    • http://noporotosodapo.epizy.com/what_is_the_plot_of_romeo_and_juliet_act_3_scene_2.pdfIn PDF document text
    • https://s3.amazonaws.com/wezukep/zufemiji.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/34821815569.pdfIn PDF document text
    • http://pevinojemodil.rf.gd/82976432074.pdfIn PDF document text
    • https://s3.amazonaws.com/feseni/adobe_flash_player_for_chrome_browser.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d12737e2-2d2b-44b9-a08c-41c13ce6e82a/vipebex.pdfIn PDF document text
    • https://s3.amazonaws.com/zubata/17160164256.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_off00012ae4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AE4 5380 bytes
SHA-256: 3bdb0d450e351ad9c1f6db2de6c6e22d5ad123c075ddbb422063a9413243abf8
font_01_sfnt_off00013d1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D1C 11676 bytes
SHA-256: 26d2f8b8f4f26d4d802a9c834e7ac8dad958eb65205673f41a6cc98d6059fb02

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