Malicious PDF — malware analysis report

Static analysis result for SHA-256 830ae47dc56fd24f…

MALICIOUS

PDF

74.8 KB Created: 2021-03-28 14:30:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 86a6b289d0831ce93b83e5a0cdb93631 SHA-1: 6c207fa2e08f0181b1438081abcd66007cfcc66e SHA-256: 830ae47dc56fd24f930ecc0de6d58771aea3091dba80eb57d6e54e883512f94a
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent link pointing to 'seumenha.ru', suggesting a phishing or malware distribution attempt. The document body, though corrupted, contains text related to 'Cmake quick guide', likely a lure to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://seumenha.ru/123?utm_term=cmake+quick+guide PDF link annotation
    • http://fopokigife.mywebcommunity.org/26415122939.pdfIn PDF document text
    • http://zarabatyivat.ru/how_to_put_a_bobbin_in_a_singer_classic_sewing_machinea28zs.pdfIn PDF document text
    • http://bristol-yalta.run/419999257131e4oi.pdfIn PDF document text
    • http://magnetfix.store/how_to_find_interior_angles_of_irregular_polygonsnxrjl.pdfIn PDF document text
    • http://xunetokawetik.sportsontheweb.net/punjab_text_book_biology_10th_class.pdfIn PDF document text
    • http://zuvowizetigeko.22web.org/alora_song_2019.pdfIn PDF document text
    • http://xovekofetovo.66ghz.com/dt466e_rocker_arm_torque_specs.pdfIn PDF document text
    • http://skywonder.space/u_verse_remote_codes_for_lg_tvb1pil.pdfIn PDF document text
    • http://epipog.com/domupipabevixe37iuj.pdfIn PDF document text
    • http://vivuvulefova.iblogger.org/aashiqui_3_full_movie_free.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/424895bb-c6bd-43cf-9299-8eceec21301e/angles_in_polygons_worksheet_maths4everyone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c017a89f-b16d-4561-944c-5bcf137507ab/how_much_is_a_10000_watt_generator_cost.pdfIn PDF document text
    • http://bexilonedatisud.epizy.com/hospital_medical_records_policy_and_procedure_manual.pdfIn PDF document text
    • http://danalegelelemi.epizy.com/fabupu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b446be0-2c2e-4bdf-b92a-d635be05a994/2012_camry_se_maintenance_schedule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bc78d67-6617-4c49-864d-cc052b474b21/2007_honda_fit_for_sale_canada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15ca439b-5e01-4639-8bdd-48f7d6b4ca07/how_to_set_up_voicemail_on_lg_k40_phone.pdfIn PDF document text
    • http://refawolasuwibi.epizy.com/loxamajopatek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd72363d-6176-40a3-938e-10fba4376e2b/hp_p3015dn_maintenance_kit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fcd73e3-2863-42b8-bbc2-5e50e01d0013/donofobokuvinita.pdfIn PDF document text
    • http://kadoxosin.atwebpages.com/inteligencia_emocional_se_puede_ensear_en_las_escuelas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce1858fb-2eeb-4487-abd7-ec4554640a8b/18731216810.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_off0000e09b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE09B 5048 bytes
SHA-256: ba4d702b2db699a42147772d6de07799d9abc293906ac77ff2f377d60bada60c
font_01_sfnt_off0000f1a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A9 12668 bytes
SHA-256: 5ae5b21fe50f0a1472cf236ca6ddc1c97b767cc4b66e5244d2bca6d541645244