Malicious PDF — malware analysis report

Static analysis result for SHA-256 5375c422bdf667ee…

MALICIOUS

PDF

200.7 KB Created: 2020-11-18 11:59:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ff858e95e47181b17e01f58a745010f3 SHA-1: 154ed9f01cca231cc38ad67f665bcb4b45b722ac SHA-256: 5375c422bdf667ee7662b94cbeb731663b1b6e300c4e1cee274d7a00478f419d
154 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 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 0.9964

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
  • 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/aws?utm_term=linear+guideway+block+hiwin In PDF document text
    • https://gemaxudemaxepeb.weebly.com/uploads/1/3/1/0/131070646/2714978.pdfIn PDF document text
    • https://domenotupeloli.weebly.com/uploads/1/3/4/6/134685365/7832794.pdfIn PDF document text
    • https://pelimabogex.weebly.com/uploads/1/3/4/6/134685965/rovakub.pdfIn PDF document text
    • https://fidegobopoj.weebly.com/uploads/1/3/2/8/132815019/3460351.pdfIn PDF document text
    • https://vekosakebasagi.weebly.com/uploads/1/3/4/7/134743747/fapinofobivuz-tasenezeverag-vawawa-worum.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/906a85d3-7634-4d71-8af0-d50b1df0996c/fumafidogijibowufap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec64d0e4-4fef-4834-80b2-0f355a3b8572/46969593914.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5447e7fd-72b6-473d-b88f-52a219e543a8/wanefunixo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ab97409-41ff-4a60-a6a6-5a384baae38b/free_sozo_training_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e93b76a-0776-49ae-991c-7d0e53b50caa/one_world_montessori_parmer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ec7a255-1ec4-4393-a7f6-b65329210135/vuvuwexukabajenikutako.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/psychology_test_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002b27f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B27F 11644 bytes
SHA-256: 7f53e65cf4560e2ec84ffd73f613f5b148c391dc123cfb4a8c54ec270e9a43b9
font_01_sfnt_off0002d8a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D8A4 5360 bytes
SHA-256: a13ad541ce443748ea098da263b5b871a73b0f53c351d801ba089f8946d768fc
font_02_sfnt_off0002eaf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EAF3 12504 bytes
SHA-256: c454d4e46e2879f7a3c5d74bc9124ebf34a92fdd5be6c4fd328e4e74f5e7e49b

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