Malicious PDF — malware analysis report

Static analysis result for SHA-256 87263f4e53c3d132…

MALICIOUS

PDF

100.3 KB Created: 2021-02-15 18:05:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 3b3acd932a9a363e9f49e4e55c6d9168 SHA-1: 000f8b3cca65b137966032eb6004703b7d0c0ab4 SHA-256: 87263f4e53c3d13252c59101bf3ff2b50966ca6ab1bb8cb3bb85a7b08f110265
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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://yafferge.ru/123?utm_term=sex+offender+registry+cache+county+utah In PDF document text
    • https://static.s123-cdn-static.com/uploads/4383800/normal_5fce956c49eb0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369923/normal_600fd94a94de7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484156/normal_5fdf94c2f1c4d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415974/normal_5ffc8a114fc5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450244/normal_600f11054e7e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420760/normal_6019d9fb8eedb.pdfIn PDF document text
    • http://itash.space/5674800045m001k.pdfIn PDF document text
    • http://trysoda.pro/922838357w8h8k.pdfIn PDF document text
    • http://antonioita.fun/harrison_bergeron_plot_diagramzwx21.pdfIn PDF document text
    • http://koolmaxt.online/84101859801trxih.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zifilobesumafi/bensham_manor_school_uniform.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/using_the_definition_of_the_derivative_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/galinikagopit/zekuzamutezutelutu.pdfIn PDF document text
    • https://s3.amazonaws.com/devuxuzejozam/best_website_to_movies_in_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/97548488330.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_off00014a5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A5A 5524 bytes
SHA-256: f7237e9e8499de529d15809e3401677224fa3592b127cc88293434b7bd0cfe7b
font_01_sfnt_off00015d31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D31 11276 bytes
SHA-256: 1e060bbcfce8f0270c485eda7b4a9c2a34b0aa8bffaf3c4eec4d39af9a17cffd

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