Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca510d7d481ab2f1…

MALICIOUS

PDF

54.3 KB Created: 2020-11-04 05:54:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 5ad0edb620a75cb1523d64474bc5ab33 SHA-1: 0233cf39a22b66b4314be98e8460b633d77490a9 SHA-256: ca510d7d481ab2f1bd1a6695b184d797fc7405e32ddf9f384ca585232b3ff26d
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a direct link to a known malicious redirector infrastructure, indicating a phishing or malware distribution attempt. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of embedded URLs and the heuristic firings strongly suggest malicious intent.

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://gettraff.ru/123?keyword=steve+butler+cpa In PDF document text
    • https://nijubalalo.weebly.com/uploads/1/3/1/4/131453980/segomemufu_vimujag_mudidesa_pamufasemadanej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390330/normal_5f92d1828edb5.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/4867245.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393359/normal_5f9dfdddf2fde.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403422/normal_5f999312837c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408187/normal_5fa0d772d0c2a.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/5650151.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/0100/2174/files/oraciones_de_complemento_directo_e_indirecto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6524b2a2-c0bd-4e1a-b69e-a51bd0abebce/72333273865.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0573/8660/files/96382244004.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/298441ae-3f90-4323-96f6-f143328e76a2/kudilamilatabavoz.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/public_sector_capability_framework.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5fd8b93-d536-4e21-ad25-d006c6b38836/irrelevant_conclusion_logical_fallacy_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/jakujakula/zaxivujozisave.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00009f9b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x9F9B 25652 bytes
SHA-256: eb4b6e6fd92ef4a74289ddc0c2d78c203e62f574a2c04009707009c5f4d33ad9
font_00_sfnt_off00006866.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6866 5052 bytes
SHA-256: 446d3266bfe299e1de83794380f6d1dda6240568a70779a8d3472ac88f1744a0
font_01_sfnt_off000079ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79AB 11056 bytes
SHA-256: 8fca3b86dd918c9c082ab3740bf3cacf1073c76dd9cc0fd33bff31c0fe9efa12

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