Malicious PDF — malware analysis report

Static analysis result for SHA-256 42b6a4a11195e2e3…

MALICIOUS

PDF

42.6 KB Created: 2020-10-10 15:41:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 2de2621914c3955ccec3e0eb34a3fda7 SHA-1: b27600ead22d9064310c2dcb66e4dd21232a62e6 SHA-256: 42b6a4a11195e2e3e32e070da5a85399e58162510c92dfb9baeb90acc15dd0a7
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/strik?keyword=northstar+engine+swap In PDF document text
    • http://fapafewos.overcominghateportal.org/uploads/1/3/1/8/131856979/zarexoleraturis-sejobipemejumuk-toturaliw.pdfIn PDF document text
    • http://rutak.outreachministrieschurch.com/uploads/1/3/2/7/132740482/noxogazififuw.pdfIn PDF document text
    • http://dedor.doublebrandgadget.com/uploads/1/3/2/6/132683209/9b4c68.pdfIn PDF document text
    • http://zikuline.tiaralechelephotography.com/uploads/1/3/1/3/131383646/0f0b6adffb7a8.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/3b353b5a-12b5-45ad-9f82-0a3125b09b15/63687534422.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1574e06c-14b1-4388-b886-d2dacea14e1e/7950193871.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c593bc13-01a7-4e8c-84b1-ca0db994d800/luluw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12b3db88-7948-448e-a063-cd821a96ddbf/93050072668.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d37a3742-f72d-446b-9aa7-8560ecfa5b15/latekagopa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/536d23af-615a-4fed-9c40-78743fe5d095/wasozovoken.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f3beef8-a1f9-4ffe-8950-e937c163a9fc/kofamobeta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/4398/1978/files/ligopodafukexelezupafore.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8389/6734/files/unsweetined_portugues.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2186/0007/files/milliken_publishing_company_map_skills_the_world_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/the_protestant_reformation_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/5020/7898/files/light_and_heat_energy_worksheets.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_off0000691d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x691D 5108 bytes
SHA-256: 15890eab56ead097c633f36924d438b8a7711ffcbe40515fde10110e745992ef
font_01_sfnt_off00007a96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A96 10168 bytes
SHA-256: e838c74d8b85ff2f14fcecb439071e4bdcee74bae1d1ecf7aac33f886a1cb110

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