Malicious PDF — malware analysis report

Static analysis result for SHA-256 0878c3b88667dc0f…

MALICIOUS

PDF

123.5 KB Created: 2021-04-24 00:20:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab44f38cf38993e455ff82758df194d2 SHA-1: 0174acad5357d96c3a308a885bbadc8b1a1d660d SHA-256: 0878c3b88667dc0f514dc8aa581bcbce19401dac2b236e2b71c2f28cd4f21ca9
96 Risk Score

Malware Insights

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

The PDF file contains a URL that appears to be a lure, disguised as a search result. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to a potentially malicious site, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dafemum.ru/strik?utm_term=aeschylus+eumenides+greek
    • http://gedawirij.66ghz.com/how_can_a_thin_guy_gain_muscle.pdf
    • https://dananiruw.weebly.com/uploads/1/3/2/7/132741593/8bc2a4.pdf
    • https://metenesepagozo.weebly.com/uploads/1/3/4/7/134710396/2671155.pdf
    • http://org-fruit.space/22954612556h9eaa.pdf
    • https://towipikegogu.weebly.com/uploads/1/3/4/6/134690187/ridefok-tuvevupidebep.pdf
    • https://todumubisopid.weebly.com/uploads/1/3/5/3/135312552/vupiwazitupu_rilefadovad_bupudewu.pdf
    • http://rukunikuxajosog.22web.org/62217546764.pdf
    • http://lnstagramoriginal.com/zudiwiwedusikupof6hun8.pdf
    • https://salubekera.weebly.com/uploads/1/3/2/7/132740515/a5a1ef649cd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/678a4481-b692-439d-9243-dde519354405/are_husky_compressors_any_good.pdf
    • https://uploads.strikinglycdn.com/files/8f793723-8a21-4c09-a82f-b3f28763492c/how_to_do_a_global_search_on_ipad_home_screen.pdf
    • https://uploads.strikinglycdn.com/files/2586c03d-c0a1-4123-8afb-bcbdc38db136/84682649500.pdf
    • https://s3.amazonaws.com/tokit/digital_logic_circuit_analysis_and_design_free.pdf
    • https://uploads.strikinglycdn.com/files/3fa09c97-8204-4632-8ce6-8d09dae5629f/skyrim_dragon_language_translator_symbols.pdf
    • http://monafepunojam.epizy.com/additional_mathematics_1_textbook.pdf
    • https://uploads.strikinglycdn.com/files/0b22bdbd-7363-4655-b1fd-6259918139f3/99740522874.pdf
    • https://uploads.strikinglycdn.com/files/a55f433f-0c1b-402e-a191-259449e52d0c/27635298960.pdf
    • http://kegapijev.rf.gd/fundamentals_of_engineering_economics_3rd_edition.pdf
    • http://vafikozokus.rf.gd/microsoft_project_gantt_chart_download.pdf
    • https://s3.amazonaws.com/levovod/36243678090.pdf
    • https://uploads.strikinglycdn.com/files/ab3b38b2-d6d3-477d-825d-2100b51dc3e3/how_to_adjust_the_laser_on_a_ryobi_miter_saw.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001a80a.bin
89476ddb7ad7fbf8e7d68f4b828f267db288e42167a85133315cda830409ee53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A80A 5300 bytes
font_01_sfnt_off0001b9f0.bin
b271ead5d46792bb29986bc726ffb447350baaef3022665a09e916284063e473		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B9F0 11840 bytes

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