Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f643e7be458d1c9…

MALICIOUS

PDF

41.0 KB Created: 2020-11-01 22:35:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: c001c31ac439c27f0e363ec5716f471d SHA-1: 7845803d9db1da5c8fc28e87f6a65701192ae709 SHA-256: 4f643e7be458d1c964cb8aa9183ecac7b05b18e3da4468d1cd522f85ca01f074
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=texas+pug+rescue+of+dallas In PDF document text
    • https://cdn-cms.f-static.net/uploads/4403688/normal_5f95f7623dbbf.pdfIn PDF document text
    • https://zevejekigo.weebly.com/uploads/1/3/4/3/134374512/gejizunapuxizuwek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368227/normal_5f8a47a68bfee.pdfIn PDF document text
    • https://lisajakuxateril.weebly.com/uploads/1/3/4/3/134349263/fanagusesoxut_gaxakinup_piremubar_sododuponat.pdfIn PDF document text
    • https://biwefixosepow.weebly.com/uploads/1/3/4/3/134334309/tovoloxupir_torukimipiwaw.pdfIn PDF document text
    • https://sakifawabepufa.weebly.com/uploads/1/3/4/4/134466371/zuzezewikavomabesa.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/b9094524-051d-4882-916a-b685a03064f7/zumizuvoredavivomevuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74e1e50b-6fc1-48e4-987a-467189e6bbdb/5005057151.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b754731b-2317-408b-ab35-b422e70ea7da/7_loader_by_daz_2.2.2.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/jabatavavusopesunulizebef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c250194a-9c83-422d-a341-8de4108a0b00/32418353308.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22e4bb6f-8177-491a-989d-66f6d594660a/tales_of_aravorn_seasons_of_the_wolf.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/vedorigoditikekonip.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_off000052df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52DF 4988 bytes
SHA-256: 4fcca622b0cde5579187fadf72002ab330b51e37649c2b7d9eb837982178978d
font_01_sfnt_off000063f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63F3 10872 bytes
SHA-256: dd72f99055bb7f56411303c9e24badaa0384cf8133ee6f59a795cc131764ecf0
font_02_sfnt_off0000892e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x892E 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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