Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce24c2fbbb11a39e…

MALICIOUS

PDF

34.4 KB Created: 2020-11-05 23:40:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: e83455093d5221effa344c4e3c9ba382 SHA-1: d87ac88c5c93ec01e5d5f3c1429226796a4ce5dd SHA-256: ce24c2fbbb11a39eb733b1768b41de7bdbfb0df4aaea8b84a7f2604d58831f91
94 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 an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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://traffmen.ru/strik?keyword=tetris+unblocked+games+shs In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366035/normal_5f86f99d08888.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402503/normal_5f961750903a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387565/normal_5f8ee0f039e21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388819/normal_5f9e6559555ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366055/normal_5f89753535253.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc094473-3b89-4260-aeb5-1cb879edf707/southern_high_school_new_jersey.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f3d4e55-d63c-4443-a693-e390b742b7d2/happy_wheels_demo_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ca37c35-8051-47b1-b0de-516c5af308e1/6677830306.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20c14d7a-8f14-4fa4-8251-072244054aad/9479698167.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/acls_protocol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03fe863b-1d16-478f-a64b-a3609010ac2b/25658430741.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/78652002751.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55d139dc-d871-4561-b03a-7cb5806d5987/download_focus_movie_2015.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af666103-d4ec-4365-b298-5642e1be9826/mixob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aaa1c798-ede8-4634-8518-81dc1676dbae/libro_el_caballero_dela_armadura_oxidada.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_off000048e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48E7 5504 bytes
SHA-256: 375f2799635fe6ac10a6236ae6ab5d769254cb980b2c8daadbd4d45d2599c13b
font_01_sfnt_off00005b73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B73 9876 bytes
SHA-256: bdc8fe099887d618065b80e8bc2ea58d23a708e22a7ed8a30be3e898011ff718

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