Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc8011f476574c63…

MALICIOUS

PDF

88.3 KB Created: 2021-03-20 12:40:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f4be93573d870003d3ce8eedc822025d SHA-1: 734050832937ae3da2dc8b9aa2784aa5acc5fd2f SHA-256: fc8011f476574c634763cc748cbbddd3b48586662161342c2349d3e700830e3d
96 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains an embedded URI pointing to a suspicious domain, mezovuduw.ru, which is likely used for phishing or to host a malicious payload. The document body, though heavily obfuscated, suggests a lure related to 'anomalia definicion pdf'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://mezovuduw.ru/award?keyword=anomalia+definicion+pdf
    • https://cdn.sqhk.co/kubepugemaki/HigRghf/5412268036.pdf
    • http://muvisaxof.iblogger.org/kubumexumuwisusov.pdf
    • https://cdn.sqhk.co/mibuguxinise/jhjehgb/death_rattle_breathing_sounds.pdf
    • http://garowige.iblogger.org/alkaline_foods_chart.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://renureva.epizy.com/27691853846.pdf
    • https://uploads.strikinglycdn.com/files/2e00d323-0cd2-4348-ae0c-ac10fda429e8/twilight_saga_full_movie_online_free_watch.pdf
    • https://s3.amazonaws.com/liwafo/fojepilixilida.pdf
    • https://s3.amazonaws.com/fizaxo/eichmann_in_jerusalem_epub.pdf
    • https://uploads.strikinglycdn.com/files/5ac21cd5-886c-4ec6-a9ee-7646e26ef442/ap_2d_studio_art_concentration_ideas.pdf
    • https://uploads.strikinglycdn.com/files/69a65ea6-f66c-4db8-a720-628c2f3365d0/pregnant_dream_moods.pdf
    • https://9907981b-0bc7-4fd3-a434-169f7cdadf42.filesusr.com/ugd/575363_a445af70a36c4f16aa6f3bf34bf73b09.pdf?index=true
    • https://uploads.strikinglycdn.com/files/5f921493-b225-41aa-9397-dd44d7e4b55b/how_to_get_rid_of_too_many_suds_in_washing_machine.pdf
    • https://uploads.strikinglycdn.com/files/c0e2739f-c917-47d3-b4cf-921bb9de31ad/wildgame_innovations_quick_set_feeder_w270d.pdf
    • https://s3.amazonaws.com/tixedujegibex/introduction_to_psychology_study_guide_answers.pdf
    • https://591e60e9-54e8-4b06-a9a7-f2e0522969d0.filesusr.com/ugd/1fd4b7_db13b72b3faf48a189ffd59d29b59d21.pdf?index=true
    • https://d4cba69e-f3c5-4a64-9e40-69ba24924691.filesusr.com/ugd/b73feb_d6a57e775cd54f5e9618211298b404c0.pdf?index=true
    • https://uploads.strikinglycdn.com/files/3b3952f4-6fb0-439a-97ee-718b11a2a7b2/general_chemistry_linus_pauling.pdf
    • https://s3.amazonaws.com/wibedubosateg/basic_english_grammar_book_3_saddleback.pdf
    • https://s3.amazonaws.com/voropa/bleep_out_sound_effect.pdf
    • https://0ca3454e-05ac-49fc-8d00-644b1af7be3c.filesusr.com/ugd/8bf3fc_d41c5220795f4b4dbf7723ce0d9c6497.pdf?index=true
    • https://6632aaff-1fe9-4f1d-acb3-7d444e457837.filesusr.com/ugd/ce4b7c_1fe31bdc45374a1c96a9c7ef313761ad.pdf?index=true
    • 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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb59.bin
bd70ce0bed23e66cc8d8730fd8e755b0e01597f4b74da8b3a401e001854032c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB59 5016 bytes
font_01_sfnt_off00010c5d.bin
96545d72be4643ac5547a4d734924883c77ce2688d7ae15c3e72f67fe5955e27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C5D 13724 bytes
font_02_sfnt_off00013837.bin
5fee938afd1d1de882b4d1855b0117c8bc85bd03caae8161c3cab9ab8ee3ebf4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13837 17716 bytes

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