Malicious PDF — malware analysis report

Static analysis result for SHA-256 457bcccb541de70b…

MALICIOUS

PDF

88.3 KB Created: 2021-05-16 12:49:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2847be25108dc4bac9e771b6694b758a SHA-1: 95126e46e0f65aac7a81745ec8095b3abb4812cd SHA-256: 457bcccb541de70b149ab5eb3c59f93d8dd3c9b2649ce63cc07212c5143c0e4b
126 Risk Score

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-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.
  • 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=top+photography+books+for+beginners PDF link annotation
    • http://wugumonisukanib.sportsontheweb.net/bsc_magazine_august_2020.pdfIn PDF document text
    • https://rijozixofufake.weebly.com/uploads/1/3/4/5/134509282/rugilumag.pdfIn PDF document text
    • http://pewadulojuba.mypressonline.com/duximowavokeba.pdfIn PDF document text
    • https://cdn.sqhk.co/totarujined/jjm1jff/free_christmas_invites_templates.pdfIn PDF document text
    • https://sadozilodefizon.weebly.com/uploads/1/3/4/6/134659806/jamuzezogi.pdfIn PDF document text
    • https://cdn.sqhk.co/feduminaro/bihRUfY/sliding_number_puzzle_game_2048.pdfIn PDF document text
    • https://cdn.sqhk.co/kenixidoxexi/eibXgfR/billing_explorer_windows_7_64_bit.pdfIn PDF document text
    • http://munasimowijuxi.getenjoyment.net/construction_assistant_project_manager_jobs_houston.pdfIn PDF document text
    • http://xugaguf.mypressonline.com/53190423710.pdfIn PDF document text
    • https://lunidopufakim.weebly.com/uploads/1/3/4/4/134482460/1e96191a580fb8.pdfIn PDF document text
    • http://muruxilirafet.iblogger.org/mapa_turistico_cascais.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxofidipo/jjijfhh/whatsapp_status_viral_video_tamil_songs_download.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/kiremefegonar/s._w._a._t_full_form.pdfIn PDF document text
    • http://kepagewav.atwebpages.com/79362723782.pdfIn PDF document text
    • http://gomekojesigir.rf.gd/cambium_cnpilot_e400_firmware.pdfIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/gramatica_basica_del_estudiante_espanol.pdfIn PDF document text
    • https://6739ca04-605d-4ff4-b4c9-4e5bd75a7819.filesusr.com/ugd/031dda_1a35e8508bbf47358b2ddb6cc6059dec.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bulujono/qu_significa_el_nombre_emma_en_la_biblia.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/barmeno_pro_bold_free.pdfIn PDF document text
    • http://jerananixakuzeb.epizy.com/lefurasebufanom.pdfIn PDF document text
    • https://8dac4d01-2cd1-45d2-8b5f-6005f802adc9.filesusr.com/ugd/1f96ce_1ccd2dd22f1b4e578a7534b0535b727a.pdf?index=trueIn 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_off00011a51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A51 5388 bytes
SHA-256: 62b22ca1b97a30ac98d17c23d10d5cd28cb56e3ad9f56495f74848d8ac0d6f48
font_01_sfnt_off00012cab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CAB 11092 bytes
SHA-256: 2d7768665e594f9c8aa3d18f152c1aa469d1a01da26022d97db764465aa88caa

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