Malicious PDF — malware analysis report

Static analysis result for SHA-256 53060b90374ff82a…

MALICIOUS

PDF

73.7 KB Created: 2020-12-29 22:59:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 5b8dce25f1064e38ac150980ef72ed43 SHA-1: c2cee8c8c2b3e493aae9112d8c01085cc09955d8 SHA-256: 53060b90374ff82aa4ac15f90261a9d33c6536cd55cdcb2163e64742eb79c372
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://cctraff.ru/strik?utm_term=business+model+canvas+value+proposition+explained'. This URL is the primary indicator of malicious intent, likely serving as a lure for phishing or to download further malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://cctraff.ru/strik?utm_term=business+model+canvas+value+proposition+explained In PDF document text
    • https://cdn.sqhk.co/sepunaro/zEZiiTn/ducks_for_sale_around_me.pdfIn PDF document text
    • https://cdn.sqhk.co/sisadenev/Vig6gi2/vegan_burger_near_me_fast_food.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kigavanus/sap_ibp_application_job_template.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/free_human_physiology_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/817d123e-bc91-4039-afbd-e9868b6e0cf1/xivuvopivo.pdfIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/gimuxepozigem.pdfIn PDF document text
    • https://s3.amazonaws.com/kumasala/asphalt_8_game_gameloft.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37826174-3ca2-4a43-8d27-f0c4edd58069/timeless_body_5e.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fdef842-0914-480e-a289-0225f320658b/advanced_mathematics_precalculus_textbook_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/fazujo/the_quadratic_formula.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4acd64c9-7d4e-41da-b1a2-5bd9e7549821/dunk_a_lot_apk_mod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abc00d5a-89e4-43f7-8f98-06ae6ec4c69a/53975206518.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/frog_dissection_lab_report_hypothesis.pdfIn PDF document text
    • https://s3.amazonaws.com/saxefi/apc_smart-_ups_rt_5000va_230v_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/sapomiraruvu.pdfIn 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_off0000e36c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE36C 5396 bytes
SHA-256: 18d85174e60b1f731f6340ce6c28eaf081a399dea5f595a286b3b40fb6544c50
font_01_sfnt_off0000f5ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5BA 10988 bytes
SHA-256: 5d994a3bc5f544492747544255dfe9556e9f3bd48a3b00585e13b4aabc274da3

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