Malicious PDF — malware analysis report

Static analysis result for SHA-256 478ffbb6fb40d9af…

MALICIOUS

PDF

69.1 KB Created: 2020-12-16 17:17:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 23ed6dec79d72df3567899385d664299 SHA-1: 92ebbdbb0b7fa652fe0cad203ecf30d4494d0acc SHA-256: 478ffbb6fb40d9af7cdaa4db49e988d485bba57773a5eee525238a01e7ea05c7
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 link to a known malicious redirector, which is designed to lead users to potentially harmful content. The embedded document body, though heavily obfuscated, suggests a lure related to game modifications, aligning with phishing tactics. The ML classifier and ClamAV detection strongly indicate malicious intent.

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://gettraff.ru/strik?utm_term=forge+of+empires+mod+apk+android+1 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370055/normal_5f8e2d86799f2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc2e6675bcb0228a28f7e67/t/5fc7555c93ad1a481219dec5/1606899037866/nesene.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/172b99b2-5d02-4f0f-a646-6f91de4d7efd/kigokogusasi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82b4d9a7-2d07-4b10-b8a3-c5266eed012a/28392717351.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fcf8810-3422-4502-9e80-ee2fbaa0cbb1/xebomuwopujezuminirazapi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3358922a-3ace-44ef-98c6-87ccfcaedd28/ice_age_1_full_movie_in_tamil_watch_online.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e5b8a3bf4b14aba92f9c/t/5fc9e6c12e4d7f67ca2df3fa/1607067330806/81578741536.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a36d6774-1a78-46ca-bbcc-3ce32699900a/geometry_definition_same_side_interior_angles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e686b99-915b-4ac6-9c85-7c95e15158b5/migration_push_pull_factors_worksheet.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5306ac14dfd36fe0d8a55/t/5fd60c07acac596b0cb092ed/1607863304093/18802903307.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d25a9c14-f36c-42cb-9606-b12ce28b9509/econ_100b_ucsc.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/mibabusiruw.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_off0000c525.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC525 5400 bytes
SHA-256: 4ae7497a504a3bcc0589eb22b773a2277cd1fb5e4049d823ee40c1a3e3f1b6f6
font_01_sfnt_off0000d77d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD77D 14852 bytes
SHA-256: fed39f643426c11e317e317f6f899c5bbe372c0b9b0028ad54f6acf9a1c27621

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