Malicious PDF — malware analysis report

Static analysis result for SHA-256 b430a9853f49d317…

MALICIOUS

PDF

31.2 KB Created: 2020-11-05 02:05:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 1bb901a3e68414a37d8311e30a8753f6 SHA-1: 5d0e3ba1896a5a9a1ac4a03c3898fd179a3868b1 SHA-256: b430a9853f49d3173c13ae6e1089409f36bfb552c70eda8923f6fad31a18db7a
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://ggtraff.ru/strik?keyword=food+inc+worksheet In PDF document text
    • https://tovozilulu.weebly.com/uploads/1/3/0/8/130873983/ligipa_jinetemara_lovepudam_videwetobe.pdfIn PDF document text
    • https://sojebubibofanex.weebly.com/uploads/1/3/4/5/134512436/tejumowokiwevalu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368752/normal_5f8801aa4880b.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/bawap.pdfIn PDF document text
    • https://rawebitor.weebly.com/uploads/1/3/4/3/134337567/vejodezakazeta.pdfIn PDF document text
    • https://vunixumo.weebly.com/uploads/1/3/1/4/131453253/rogozik.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/putelekireza/indian_states_capitals_and_languages.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3a25fc2-deaa-4030-baa5-f99a54ba22f8/katabuvafurev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4cc93f7-b8b9-4f66-a434-4c794dec15ef/39558405486.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_off0000411e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x411E 4896 bytes
SHA-256: dddb22d83e7e6f9056693ca436fcecba2ea366bd1a7e31acb4f0dbedb8fd6942
font_01_sfnt_off000051d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51D7 9140 bytes
SHA-256: 2d3029759f3e3aba00a7d43207fa2a3051c0962ce8825dd6b633bf631feca5f7

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