Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf366e7f25b26368…

MALICIOUS

PDF

74.8 KB Created: 2021-05-04 10:28:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 791c2b102e7162ad879e2629645f478c SHA-1: 943dea29b87b483e716bc37875dc5afcfb8feb89 SHA-256: cf366e7f25b26368ecf5405f015f25aeeeff7a3e71e07a1154daee55626af7e2
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

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://nipisod.ru/strik?utm_term=lord+of+the+flies+comprehension+questions+answer+key PDF link annotation
    • http://auto-agents.space/15629145406b07iz.pdfIn PDF document text
    • http://duzegotola.medianewsonline.com/allahabad_high_court_aro_notification_2020_download.pdfIn PDF document text
    • http://sevibifodome.getenjoyment.net/anxious_for_nothing_book.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416811/normal_5fd223b18a1af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366011/normal_6051e901ccd03.pdfIn PDF document text
    • http://alifan.store/physics_formulas_for_class_12_maharashtra_board6bh7i.pdfIn PDF document text
    • http://huaweistoreukr.xyz/public_speaking_for_college_and_career_11th_edition_ebook90br4.pdfIn PDF document text
    • http://scriptbook.xyz/odontograma_para_rellenar_onlineipgd4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1864c106-1a4f-4194-99fb-dabd5a0af450.filesusr.com/ugd/17b194_d7c83138a5354342b2887cc34aa55970.pdf?index=trueIn PDF document text
    • http://vekabun.myartsonline.com/70834672750.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcba039b-2378-405d-9ef4-f9e9766b40b8/how_to_charge_baofeng_radio_in_car.pdfIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/lelijusux.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/security_engineer_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/figidireki/autodesk_cfd_software_free.pdfIn PDF document text
    • https://882e4f53-a7e1-4d4a-89e8-a6e6d9f9b805.filesusr.com/ugd/9a13d2_d3d8fcefff51407f8dcc829a7642ec9e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/how_to_clean_drain_filter_on_whirlpool_duet_washer.pdfIn PDF document text
    • https://4868a29a-6d77-448d-a9c5-bc5c6a1713c3.filesusr.com/ugd/060e50_f78722230d30419ab7cd48f755e1350d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c2ae545-8832-41d0-ba17-91096b08c092/1232012473.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ea7e3d9-d04f-4a19-aa5c-2de8439cb786/shell_scripting_tutorial_in_linux_for_beginners_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3b26a92-76f4-48d2-9073-f55823c9cc38/book_report_example_for_3rd_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/woxorojero/74721064499.pdfIn PDF document text
    • https://c84d532c-3b33-47d6-96aa-4134a1164eb1.filesusr.com/ugd/6d45f6_ae22d97925d441b5863be54d810e45d3.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e803.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE803 5720 bytes
SHA-256: fc818b9af7070eee7922222d5211b8a3e39425911ed49270b56597825b6d4163
font_01_sfnt_off0000fb66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB66 10032 bytes
SHA-256: c591275e1e7351c92aaddf83870e56463843c45bf55c7bf742abd4fa95369705

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