Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3e4ef5c7b7ba0bb…

MALICIOUS

PDF

63.0 KB Created: 2020-12-17 05:52:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-21
MD5: af5faef84f9884378aa8b9850dfbc605 SHA-1: 0735c0ab910fd8d0a54d5a96086d61f72b496c7a SHA-256: d3e4ef5c7b7ba0bb6f43dc80171012c4fd776d05766d4f6979099d8d485b25b8
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://cctraff.ru/123?utm_term=essential+cell+biology+4th+edition+free+pdf In PDF document text
    • https://vaxajiwozoli.weebly.com/uploads/1/3/1/6/131637631/xupaw.pdfIn PDF document text
    • https://nokifijipuf.weebly.com/uploads/1/3/4/3/134305843/165d8d8d4.pdfIn PDF document text
    • https://kizilezena.weebly.com/uploads/1/3/4/3/134354573/botevevagu.pdfIn PDF document text
    • https://kaxobemux.weebly.com/uploads/1/3/4/6/134676595/tinadasikimesam.pdfIn PDF document text
    • https://rebivawofud.weebly.com/uploads/1/3/4/3/134375894/ac950fbdbc41f.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/aca484d8-63e5-4647-83c5-03f560b8ad7a/bo_staff_training.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f7075e7-9aa4-478a-aa2d-f7a86e8beddd/sururijewiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/032e4b80-71bb-4f8e-b36f-d53bb7dd7c99/i_want_to_be_a_missionary_now_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3030b9ab-347c-483d-8dba-28031e56ba7e/unauthorized_data_disclosure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bbface5-c41a-4cf2-9781-f345a0029ff8/86747958327.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f6c4e5c7695ca99bf722/t/5fc18791fa04221c71598378/1606518674424/semi_truck_repair_manuals.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dd27ff3-03aa-4619-b316-7a37c22f7811/28676935552.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_off0000b86e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB86E 5704 bytes
SHA-256: a8a5e06d1ecbb945684e1439360edbe5bb897e740f9cc1c636bc068d56aee5a5
font_01_sfnt_off0000cbe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBE0 10492 bytes
SHA-256: 9eda18b25f654debcc35b378b5a0109d33491c36d02efbe2cd6ed0be93613eab

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