Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c91599e413d989e…

MALICIOUS

PDF

68.7 KB Created: 2021-03-14 18:55:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b04771f62ea023e3c10b58570ebe0901 SHA-1: d0b0a5e6a4168733feae578bd983766f1f93836b SHA-256: 9c91599e413d989ea22377647d2a752c253f01693711d1251c45cae3844272d8
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to contain metadata related to the URL's keyword, suggesting a lure.

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://maypoin.ru/wix?keyword=733+area+code
    • http://zafikapasipugog.medianewsonline.com/texas_general_durable_power_of_attorney.pdf
    • http://punejew.mygamesonline.org/pisodijijazivelevekap.pdf
    • http://xepuxupipe.mywebcommunity.org/surah_yaseen_al_kalam.pdf
    • http://rukawagamijo.iblogger.org/tuvozewanok.pdf
    • http://gixitetopes.scienceontheweb.net/ancient_greek_and_roman_art_time_period.pdf
    • https://cdn.sqhk.co/begokaxawip/jj55jhe/aerofly_fs_1_flight_simulator_indir.pdf
    • http://gunepevoxop.66ghz.com/4825854627.pdf
    • http://jevufoduxixan.22web.org/fox_sports_3_tv_guide_australia.pdf
    • http://rarebuzoxexovom.22web.org/identity_theft_reports_2018.pdf
    • http://gepokupaburorew.mywebcommunity.org/how_to_test_actuator_in_spring_boot.pdf
    • http://joriwolujuf.sportsontheweb.net/maths_worksheets_for_grade_7_cbse_with_answers.pdf
    • https://cdn.sqhk.co/vunofufi/8gcwjif/injury_report_chiefs_vs_patriots.pdf
    • http://korixoludofuguk.scienceontheweb.net/list_of_acronyms_and_abbreviations.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://sedoguzod.rf.gd/74576973875.pdf
    • https://33c7e2ec-32fc-4676-a642-9d95a4379e01.filesusr.com/ugd/622218_3ddf3f8a59b64866b5455c31813a3966.pdf?index=true
    • http://fijukarevi.epizy.com/que_es_lo_que_lleva_un_proyecto_de_investigacion.pdf
    • https://7fad2989-91b8-457c-89bc-9a0e7aeef19f.filesusr.com/ugd/b03ff3_72759e149a71434693441dbba1b31412.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d203.bin
6f283cb54f0058c49f476b713c835e18e2ed9c333b590b059f75927a29709de4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD203 4872 bytes
font_01_sfnt_off0000e2a7.bin
dbbf7a693ec2181639926527d377185f2bcba79d834589ae9fa94264701a03b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A7 10504 bytes

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