Malicious PDF — malware analysis report

Static analysis result for SHA-256 f949e5399d036296…

MALICIOUS

PDF

33.5 KB Created: 2020-10-31 00:08:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: c091613dc7c5a4b10bf705cc4ddb1332 SHA-1: d91524199ec959ba56a6d23b2881bb05230e9d52 SHA-256: f949e5399d036296afd7f797bb12a18a3cdef89980df4f9773c4e4a89e2c944e
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/123?keyword=the+roles+of+rna+and+dna+page+306+answers In PDF document text
    • https://viweposedijul.weebly.com/uploads/1/3/1/0/131070314/puwafewisuxukapo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386095/normal_5f8fb17d43126.pdfIn PDF document text
    • https://digonowokeke.weebly.com/uploads/1/3/1/8/131856318/2210070.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/1/0439/3811/9838/files/menosodamu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/5413/3159/files/antihypertensive_guidelines_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e34cfcd6-5cf6-4a8c-a770-79b4e865d24c/xikixamarewoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/2033/5273/files/18170335866.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/3809/5525/files/tiporap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50b58c79-d4f6-48f4-99f2-aa0982da8e95/90212696596.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9302/4149/files/90261770897.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_off0000446f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x446F 5804 bytes
SHA-256: 8f61ad70b27c122c16bc707253cfadf3947c857048fbb21c88cd85512120dc96
font_01_sfnt_off00005832.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5832 9768 bytes
SHA-256: 42770b0ac4b3b79dfaea0910f52cf2c52ea154c79e32daea36240482f4e1da9d

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