Malicious PDF — malware analysis report

Static analysis result for SHA-256 de17d4a145e6ed74…

MALICIOUS

PDF

77.8 KB Created: 2021-04-08 08:24:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 8dc3302615d48843bf008e1fc7aa6b0f SHA-1: 427aeaa7a8d90c18c6154c6255ec95f224a66f6a SHA-256: de17d4a145e6ed74e975e517e85d6318f80a372f990268722935ebe5c3c52d0c
96 Risk Score

Malware Insights

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

The file is a PDF document that contains embedded URLs, one of which is identified as a lure for sheet music search results. ClamAV and an ML classifier flagged this PDF as malicious, specifically as a phishing trojan. The presence of multiple unknown URLs suggests a phishing or credential harvesting attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/123?utm_term=beethoven+fur+elise+beginner+sheet+music PDF link annotation
    • http://rubeatyshop.xyz/how_to_set_g_shock_51469bm28.pdfIn PDF document text
    • http://natfreshik.fun/44400907444g6y3d.pdfIn PDF document text
    • https://lixuzagaleve.weebly.com/uploads/1/3/0/9/130969249/jusedopo-ziterope-kinogamivake.pdfIn PDF document text
    • https://xisiwazebisa.weebly.com/uploads/1/3/4/7/134758569/921d214a5061.pdfIn PDF document text
    • https://dijajogid.weebly.com/uploads/1/3/0/8/130874349/jikuvut_nulideduf_ponip.pdfIn PDF document text
    • http://guwajokuxo.22web.org/71703262780.pdfIn PDF document text
    • http://rexexepunefa.22web.org/plataforma_arduino_o_que.pdfIn PDF document text
    • http://drenajkrasnodar.ru/how_to_become_a_vet_assistant_australia657px.pdfIn PDF document text
    • http://good-production9.site/where_to_take_unwanted_clothes_near_merq8o2.pdfIn PDF document text
    • https://xidekazepo.weebly.com/uploads/1/3/0/9/130969591/suzomovaw_notojabun.pdfIn PDF document text
    • http://xovekofetovo.66ghz.com/arioso_bach_trumpet_sheet_music.pdfIn PDF document text
    • https://romarifekaxa.weebly.com/uploads/1/3/2/6/132683260/9838814.pdfIn PDF document text
    • http://genusadnlo.space/20514197817rh2bs.pdfIn PDF document text
    • https://xamoxuwubedus.weebly.com/uploads/1/3/2/8/132814415/pujuparenoripesame.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rexogeguxosix/5503993956.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/journey_ps4_trophies_guide.pdfIn PDF document text
    • http://tituroxir.rf.gd/vodipibomibebatit.pdfIn PDF document text
    • https://s3.amazonaws.com/gupojakami/voluwizunevudi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f6d4d75-e750-4813-8c65-d83541c82fe9/14838053938.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7055e705-8298-416e-847b-63f66e2ec041/rca_atlas_10_pro_tablet_with_detachable_keyboard.pdfIn PDF document text
    • https://s3.amazonaws.com/murudute/westinghouse_32_inch_led_tv_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/materi_akuntansi_keuangan_menengah_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c8d760d-346b-4d6f-9ac8-f532715970af/los_generales_de_dios_4.pdfIn PDF document text
    • http://baratak.rf.gd/lasko_48_inch_performance_tower_fan.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_off0000f06c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF06C 5336 bytes
SHA-256: 9f1b5c84fc789812689e3c27bacb3e3140df4f4e9c4f4c860e2d133edff06686
font_01_sfnt_off00010282.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10282 11816 bytes
SHA-256: 88c7c70826718df8c26b3ad7f690670cc3e46cd1ee6268264e240e3b2001cdb3

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