Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc3a0baa023de901…

MALICIOUS

PDF

78.5 KB Created: 2021-04-05 12:17:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e99826b8a7d60c01da735e54702cd67e SHA-1: b451ded254cac1d4f99ddb37eacc1ff6ae53eec4 SHA-256: dc3a0baa023de901a024d5c9d3c4221d0ef63c41c2ddab5eaff6062b41978359
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URI that points to a URL designed to trick the user into downloading a PDF. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to deliver a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://lozipotod.ru/award?keyword=branding+strategy+pdf
    • http://muvariwiporiju.iblogger.org/electrolysis_worksheet_gcse.pdf
    • http://zoomita.fun/76894047226xdeer.pdf
    • http://wudaxozibutix.sportsontheweb.net/how_to_use_a_scale_ruler_on_plans.pdf
    • http://vuwefedope.sportsontheweb.net/zixilakikigunizosevizurog.pdf
    • http://kuworekokinig.medianewsonline.com/telugu_vastu_books_free_download.pdf
    • http://kimidenexikox.getenjoyment.net/jepirafedugujoj.pdf
    • http://nurokojo.mypressonline.com/beattie_bridgeman_equation_of_state.pdf
    • http://xubesepa.22web.org/18533651273.pdf
    • http://titodisoke.22web.org/teorias_para_explicar_el_enlace_covalente.pdf
    • http://begokawepene.22web.org/tomb_of_annihilation_appendix_d.pdf
    • http://blankid.ru/birthday_gif_free_for_whatsapp45e01.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gizixaxeviduf.myartsonline.com/javipumazip.pdf
    • http://gesuposobevexo.rf.gd/guidewire_jobs_in_canada.pdf
    • http://kufalogomisag.epizy.com/rololajid.pdf
    • https://s3.amazonaws.com/kaxukok/how_to_calculate_atoms_and_molecules.pdf
    • https://s3.amazonaws.com/lusegokaves/lavajewudejotutatujokul.pdf
    • https://s3.amazonaws.com/gavapozalilup/18224889178.pdf
    • http://fobonerenajob.epizy.com/tinadimanebusilabiwuku.pdf
    • http://dakafatuvuguviz.atwebpages.com/cooling_tower_maintenance.pdf
    • https://s3.amazonaws.com/muwomapotumugi/what_does_the_half_blood_prince_book_do.pdf
    • https://s3.amazonaws.com/mavixu/nonketotic_hyperosmolar_coma_treatment_guidelines.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_off0000f2e2.bin
e4b6eb5d0dad65ecc8c45baa60e298b542a84330b5cbd7a672271585205d1a3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E2 5328 bytes
font_01_sfnt_off00010520.bin
3082bf2a2e378fd070c58557794692bf5f4cb54b83bf533a4af3ce2a17a4a892		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10520 11440 bytes

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