Malicious PDF — malware analysis report

Static analysis result for SHA-256 4252b2e823bbe5ec…

MALICIOUS

PDF

46.5 KB Created: 2020-10-25 03:06:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-15
MD5: 15553cbc1ec97b1999dfd389c70d1bc2 SHA-1: 05db32c5d485125c7ae682e2dc8bc11aa6e3f6b3 SHA-256: 4252b2e823bbe5ec6868e4fa1e7fe9761553ce580927f8ac7d06b7f597354e43
182 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wb?keyword=ramayana%20pdf%20download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4376600/normal_5f8a6ef94d4a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378641/normal_5f8fcbb913a00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403531/normal_5f94aae725476.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/09c8b7eb-ebde-4244-95a3-14396855084c/20215362899.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87db6f1a-490a-4b6a-85c0-e6db3dd63e9c/osrs_ge_chaos_rune.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26ec551a-3a3e-45e0-bf12-a7a9ab3ece90/the_postman_always_rings_twice_book.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/62836256864.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/selling_skills_assessment_questionnaire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29db302d-2066-4025-a889-42e56127613f/98301623322.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12a55fa4-27ba-4150-bf2a-4d352f2f483e/nufuwemobuboratolowuxu.pdfIn PDF document text
    • https://s3.amazonaws.com/sabegokek/mesoxa.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/jubiwopetenugonovog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76fb0cd5-c988-4a8a-a429-46f3a55ae00b/15938254866.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/210709e6-9f0f-42e4-af22-3a1a371e0bbc/54818902259.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B18 4656 bytes
SHA-256: cdd81d53e9b030ee4cc677c812cd93aa31c32cb3c956ef261c3b64a6d9f705f7
font_01_sfnt_off00007aed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AED 10576 bytes
SHA-256: 2bee2b623f14455b22e9785597ff206c88e7ecea5434ab40a59315ef81055255
font_02_sfnt_off00009eea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9EEA 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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