Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ba3755e4808810a…

MALICIOUS

PDF

84.6 KB Created: 2021-05-10 16:48:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8bbfe4368c29dbdc376012984b02984 SHA-1: d1ce5d4928e2e499f1ad4f448ca2d84416f20cdb SHA-256: 2ba3755e4808810a092e118dbd421f03e897b2b8ae4413f899204cd250e8ea70
96 Risk Score

Malware Insights

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

The file is a PDF document flagged as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware download site. The document body, though heavily obfuscated, contains references to 'Jenkins' and '.net core', suggesting a lure related to software development or IT infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/strik?utm_term=jenkins+.net+core+3.1
    • https://cdn-cms.f-static.net/uploads/4365541/normal_5fd26dd10dc69.pdf
    • http://foriponawu.iblogger.org/4449562066.pdf
    • https://tupeduwexawagov.weebly.com/uploads/1/3/1/6/131607208/1476722.pdf
    • https://cdn.sqhk.co/pozazoji/jhgc2gh/51173781725.pdf
    • https://doruxajowivabog.weebly.com/uploads/1/3/4/8/134870444/piviborojagig_bisujelepi_ruxomikituwixan.pdf
    • https://cdn.sqhk.co/jigitovewuk/jhvcbgh/weather_underground_nyc_10_day.pdf
    • https://cdn-cms.f-static.net/uploads/4486351/normal_5fd0eb6da939f.pdf
    • https://cdn.sqhk.co/feketukadoz/jSctJgj/jejugeraxejo.pdf
    • https://fozipapuratub.weebly.com/uploads/1/3/6/0/136088586/7932361.pdf
    • http://bobixuposu.22web.org/is_there_a_wings_of_fire_book_16.pdf
    • https://cdn-cms.f-static.net/uploads/4458622/normal_6050b523166f2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://vizebafep.epizy.com/kexegejipiwakegevexafotu.pdf
    • http://ribaxekag.epizy.com/how_to_make_jabra_sport_discoverable.pdf
    • http://kasedabinat.rf.gd/puxatuxuloxofos.pdf
    • https://s3.amazonaws.com/pigolo/format_date_in_tableau_calculated_field.pdf
    • http://kisolapuri.rf.gd/curso_de_ingles_gratis.pdf
    • https://s3.amazonaws.com/rizezobabub/liquid_liquid_extraction_experiment_lab_report.pdf
    • http://wetiruri.epizy.com/freezer_not_cold_enough_for_ice_cream.pdf
    • http://nabesazuxipuf.epizy.com/pinimorixude.pdf
    • http://birijigasexow.epizy.com/ceo_delhi_voter_list_2020.pdf
    • https://s3.amazonaws.com/jamuluvuvava/39048471153.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e481.bin
5a606783087614ce1ed41f42ba721940dc2147998d9e464a3cbe1d9790beee6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE481 4640 bytes
font_01_sfnt_off0000f453.bin
93c67458dd834530fd2e8ebf3af43dd92164c49ea257717e99394679b39786e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF453 11588 bytes
font_02_sfnt_off00011c35.bin
7ea620895b07bdf4958772352d156b40e7455b4e011d2c2f3821164b60f17a37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C35 17480 bytes
font_03_sfnt_off00013629.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13629 4324 bytes

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