Malicious PDF — malware analysis report

Static analysis result for SHA-256 da3a7de6000deb35…

MALICIOUS

PDF

64.3 KB Created: 2020-12-03 10:01:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 308cfdd452e68aee64e70cc9ba771ba5 SHA-1: d35ac96fb39c26b68d1e3ac4a229381ceac3a21b SHA-256: da3a7de6000deb35d06e4d03d2eea2f28ce8d8a54f898240ed1694c7fbd234e1
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 0.9980

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://cctraff.ru/strik?utm_term=who+sank+the+boat+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4492880/normal_5fb8de72809c7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382003/normal_5fc6ba127a61e.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/jezekemunidup/basf_we_create_chemistry.pdfIn PDF document text
    • https://s3.amazonaws.com/nevovumowa/bollyshake_dance_video.pdfIn PDF document text
    • https://s3.amazonaws.com/xesigeze/52161683148.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/59953901829.pdfIn PDF document text
    • https://s3.amazonaws.com/zagubip/topuluv.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/baskin_robbins_job_application.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/lab_assistant_questions_and_answers.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_off0000bc84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC84 5220 bytes
SHA-256: 5a417460f15ea33dde9357156a56aba05163643c53af1ab4250d44cd22d6316c
font_01_sfnt_off0000ce50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE50 10996 bytes
SHA-256: 8b6a70427e33daf2a858fc16ed25fefd595a6ce75ed81350ed8a5967faa4130f

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