Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed398b2af3f092b6…

MALICIOUS

PDF

68.5 KB Created: 2020-12-28 00:33:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-04-07
MD5: 5013af1cefd07372e6c99ddb5b4607b1 SHA-1: 1f9f2e6c97bdd483c21bb715009ee6e7ec100a64 SHA-256: ed398b2af3f092b6c9bb9683643085d815d3d542a8c79349b9835bfe3710e58d
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://ggtraff.ru/wb?keyword=starfall%20reading%20program In PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/been_together_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425726/normal_5fcc9c005d2e6.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/automotive_relay_cross_reference_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/comparing_numbers_3rd_grade_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/macbeth_act_1_scene_3_worksheet.pdfIn PDF document text
    • https://jinajifija.weebly.com/uploads/1/3/4/8/134889339/520057ed177940.pdfIn PDF document text
    • https://s3.amazonaws.com/satulibaren/headway_beginner_workbook_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/kigavanus/82549978775.pdfIn PDF document text
    • https://litukepulaj.weebly.com/uploads/1/3/4/8/134863372/d67b747f.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000cf65.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000cf65.bin)
    • https://uploads.strikinglycdn.com/files/5ff393c7-5b33-4f35-ab4f-3d7971103fb9/bukimorevavedetaxaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bcd38ba-29fa-4413-87a2-31ef291c11d0/vikub.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 extracted file (font_00_sfnt_off0000cf65.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF65 5288 bytes
SHA-256: fedd2e090ba0a5a58afdc9465fbd33b0ebe0b5cbc3ab505cb0830beb14f2dcc3
font_01_sfnt_off0000e14f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE14F 10652 bytes
SHA-256: bda06c7913e3d635374281b32958d7cbc99e880a6da1cf4522c8d260d96e3346