Malicious PDF — malware analysis report

Static analysis result for SHA-256 238b923f3ac3aa8d…

MALICIOUS

PDF

83.5 KB Created: 2021-01-03 05:53:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6f93984a22c08c10580219cefeaae136 SHA-1: d3151b7a5643f8829f9f3486673999e3d5af1e8c SHA-256: 238b923f3ac3aa8d7ad397e601b5de8b686b0309ecba2ea9e1df5f503b47b68b
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links that redirect to a known malicious URL, identified as a redirector for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 5

  • 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.
  • 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://traffmen.ru/123?utm_term=shiny+stone+evolve+sword+and+shield In PDF document text
    • https://xovajuvomupug.weebly.com/uploads/1/3/0/7/130776021/64788ad476a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446155/normal_5fb3ced5e5b26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387420/normal_5fa2a0f814b35.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/e5e5ae7b-d47e-41e3-9cc0-34dc9bca019d/mettler_toledo_s220_ph_meter_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/gavobawum/muwososirofisebuw.pdfIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/fury_vs_schwarz_who_won.pdfIn PDF document text
    • https://s3.amazonaws.com/verirejon/83766084523.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b922907-24c0-4ce5-b3a2-a82945bb7dc1/pure_flix_app_free_download_lg_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c541424a-ec80-4be5-becc-b429454f22c8/rowapiki.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9EE 5268 bytes
SHA-256: 0c134f52026ed539c8ed76bd4873f98cece38f65ab75d955a0d77ba4b72160c7
font_01_sfnt_off0000fbe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE7 14848 bytes
SHA-256: 99ba1993ded3b59c3c6fc1971c9bf3d84d9020b9ee76a88da5534132dbb0e9a7
font_02_sfnt_off00012c2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C2B 16204 bytes
SHA-256: 45b5410e94865c0dd9ab91c8d285d61133869b7df5a0e71c67ba4da6f0c4c9f5

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