Malicious PDF — malware analysis report

Static analysis result for SHA-256 72b8bad82faffa5e…

MALICIOUS

PDF

61.9 KB Created: 2020-12-10 12:09:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-28
MD5: f41c642cf82f1c3d55904e1b22a3f164 SHA-1: 3152c4e2c2499010f89a6dd88fc07d926aee7201 SHA-256: 72b8bad82faffa5eee7e59e2ca8e64e33e2184e97b1760e51098b1c9eadaef09
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/wb?keyword=simple%20harmonic%20motion%20lab%20report%20abstract In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf7c8a97599144ebd3d87/1606285257237/negawirul.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/mubegafixokewufopigaki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e6c41d3-f77e-4a7d-81ed-0b967de70004/triangle_proportionality_theorem_wor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af1e6f1e-53f4-4557-807c-5c4b99ae3d68/93105614520.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc396e768612547ed6ed8ff/t/5fd1a3a4d97b572b89d6e999/1607574436144/air_control_tower_for_sale.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf46d6a371610b876b29c/1606218862227/joxalepemenosel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e22336f-0d79-4eb8-80d8-4006c890816f/novafupurerevugeselafiri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ae49908-994d-49ab-88b9-57754b4e6782/los_numeros_en_ingles_del_100_al_1000.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5720fc6229360eccb86af/t/5fc8a3a34b97230d0511b87f/1606984611802/my_hero_run.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41fcc554-adac-4b8a-92fa-b0c75caa47f6/10418922101.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_off0000b707.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB707 5416 bytes
SHA-256: f7347aeb6f934f87b808101159c06d82ef4ee6f496ec9e08e29a3b2f2a65f60d
font_01_sfnt_off0000c938.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC938 9936 bytes
SHA-256: 6da2c5213372836688313dc7c679ed7543405ccbf809faf6cab0c15af357b944