Malicious PDF — malware analysis report

Static analysis result for SHA-256 24b06673f531937a…

MALICIOUS

PDF

69.9 KB Created: 2021-02-18 12:09:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 464f24a9709beb3364e0f27d77520553 SHA-1: 8d2043db1d4e79d9937542148b40ebccdffde8f8 SHA-256: 24b06673f531937af4d1c65fd83c1f8b83d58d7ff0f15584b9b26b080e7c5537
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, appears to reference 'The boy who harnessed the wind book trailer', suggesting a lure to direct the user to the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://jacksth.ru/strik?utm_term=the+boy+who+harnessed+the+wind+book+trailer PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4469116/normal_5fef566c6d565.pdfIn PDF document text
    • http://justiciaforjustice.com/52788835852j5obu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410462/normal_6024f6665f9ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462726/normal_60279f31b5f7a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413373/normal_5ff14915c8c69.pdfIn PDF document text
    • http://sizegivip.22web.org/belfast_metro_map.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446165/normal_600f1c72b81da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470038/normal_5fe8c43fb02cc.pdfIn PDF document text
    • http://strapslap.online/ninja_foodi_cookbook_ukoppau.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470211/normal_5fd34dde5c994.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403117/normal_5feeca25e43ce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469831/normal_5fcf9c2b0bf9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412890/normal_6018dd44929ce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378153/normal_5feb9c7f94e3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386834/normal_5fd61288b075e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bodiluduf.rf.gd/simplifying_fractions_worksheets_tes.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_off0000d1c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1C5 5260 bytes
SHA-256: f171c6c82b56d3ca36cae5c579377a391afd4b79f0aef16c75afbc33f075fe3b
font_01_sfnt_off0000e3af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3AF 10748 bytes
SHA-256: 2ba9746a167ec4542e511f34190798e28d193d64708208aba7152daaf70c3f20

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