Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b41e3ea65ad8f8b…

MALICIOUS

PDF

72.5 KB Created: 2020-12-27 02:24:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: c861b2addd93c7da10fb3793e5578827 SHA-1: 8d4f7550c62150a6a0482d639549a88925ec4243 SHA-256: 9b41e3ea65ad8f8bd28df58544729d927b2a7fe339622f796ec14185d826cb9c
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, with one specifically pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were extracted, the PDF structure itself facilitates the attack by hosting numerous external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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.
  • 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/strik?utm_term=interesting+facts+about+conservation+of+plants+and+animals In PDF document text
    • https://kuvegegujumil.weebly.com/uploads/1/3/4/3/134367432/devizovopaw.pdfIn PDF document text
    • https://digokevun.weebly.com/uploads/1/3/4/7/134747151/5865583.pdfIn PDF document text
    • https://cdn.sqhk.co/folamudoj/hcge5f1/1st_grade_worksheets_english.pdfIn PDF document text
    • https://tototatinup.weebly.com/uploads/1/3/4/3/134332383/fb34ea.pdfIn PDF document text
    • https://nutifikidejuz.weebly.com/uploads/1/3/4/3/134347692/topagota-tufiromeratege-divabitiguzer-notewoxetilo.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/56a87cc3-2bf6-42e9-8bd1-3e5d4e6dea6f/36322440451.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e81492d5-04ac-499d-9393-19ded8e82e23/wikilufab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6142bcd8-6747-4864-9c5c-9d4d242d3386/wakadebubimibaxipa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/487aec23-a6a9-41d3-a0f2-2dbcdd34166b/12674734404.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0d02a5a-d931-43e0-9d9e-186a722140a1/geger.pdfIn PDF document text
    • https://s3.amazonaws.com/wujafivabipo/kumpulan_lagu_alda_risma.pdfIn PDF document text
    • https://s3.amazonaws.com/mesotodimus/decimal_to_binary_converter_with_steps.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/79342657171.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3affe49a-24f9-4de0-9d4d-12f73885b7d3/21113613190.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de6cf4f2-da1d-45f7-a524-a407c5187e57/jugar_auralux_online.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_off0000d929.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD929 5612 bytes
SHA-256: 9de171cc9fcdffce4b2a9baf547385859d08402a321d3cc15e36b844ff845316
font_01_sfnt_off0000ec34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC34 12100 bytes
SHA-256: e86526ed77062d5efadc7c255a5bdb5562b4f52e7f30a618c21495bbb8a26394

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