Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ef004b038862cc2…

MALICIOUS

PDF

61.6 KB Created: 2020-11-01 01:08:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b5f68d0d42c92e8163137a02f973db10 SHA-1: dbf0a1072beb4e67749176e4377035a29d57ed82 SHA-256: 5ef004b038862cc2e287befec869aba17243df62cb5b5564627b0f7747b16450
94 Risk Score

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://ggtraff.ru/strik?keyword=orange+county+choppers+death+in+the+family In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369306/normal_5f87b64569346.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393188/normal_5f8f69bd7ecbe.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/62da2519-2250-4b05-b836-516b8f7acf99/24085955330.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dbdca83-64dc-405c-9601-9468074b6f85/lizajukowikipudajuv.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/rudufowo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acd9f2de-b5c3-4b92-a682-c7a28fbef3c6/10007598896.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4410f9ff-5196-416b-ae72-f6b91749d90d/mugemakexogunukixur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f495769c-7509-4818-91ca-8f83ba5194b4/59320594951.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60397d81-928b-4be2-b6d4-6b19595ef94f/vazobasaxuzoredabivexujoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5263d936-c549-4633-833c-25fae7b0b043/5500468426.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/faputejobatom.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/ibps_computer_awareness_book.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/nigexuvunisel.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_off0000ae51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE51 5700 bytes
SHA-256: 4e7051a6f69ca601096ba97476d37e5fe9aa945eb97b6ad882e95e29fbcbe7d0
font_01_sfnt_off0000c191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC191 11588 bytes
SHA-256: 7610bbace8a2af22dc3718cbe253f9a146bbbbca1a314d923e169b7db4e7903d