Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb53046e12ad649f…

MALICIOUS

PDF

38.9 KB Created: 2020-10-12 00:18:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 0845daab6168e8790f17d3bbf30a357f SHA-1: 2d0ad9f7e762c4a22b6d57d2c4b1f5bef9f7ecb2 SHA-256: bb53046e12ad649f843aa0304323f976d07f52e1af37aea9e521671edec754e3
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://cctraff.ru/pify?keyword=child+family+and+community+family-centered+early+care+and+education+%25287th+edition%2529+pdf In PDF document text
    • http://files.mitchadvent.com/uploads/1/3/1/6/131606035/9fed20d953ef3b.pdfIn PDF document text
    • http://dipojagi.nathanadrian.com/uploads/1/3/1/3/131380480/jururuk_xeselidesir_duvaminipum_vubaviruxutafax.pdfIn PDF document text
    • http://files.babystepstosuccessfcc.com/uploads/1/3/2/3/132302907/posuwusomi.pdfIn PDF document text
    • https://site-1037193.mozfiles.com/files/1037193/66310497206.pdfIn PDF document text
    • https://site-1038451.mozfiles.com/files/1038451/6967594237.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/9fc2005e-149f-4c06-869a-5794906d8cb2/50917985500.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df9ba56e-2332-4e53-86a3-3e484cdc2e82/dagupelaxanelam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/208d34c1-2824-4ab5-b3fa-e06b9edb6d59/xirid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74949242-68a8-4346-ab2d-bb0f90c7ab3d/26457092369.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d102ee96-ba75-4bf2-b817-09b6a5383803/fezej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0609/9107/files/chemical_formula_for_vegetable_oil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9918/4022/files/35320920238.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_off000057e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57E3 5488 bytes
SHA-256: 8a1eff4dcffd8e8d0d7f20a64617ab1ddca1fa8fd95988b6b369e2e4a89bc85f
font_01_sfnt_off00006a89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A89 10420 bytes
SHA-256: 0cf56d8c3ff9f1f299a6d545badd1fc09c484dcd24a0e7473ec5c100c530e03e

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