Malicious PDF — malware analysis report

Static analysis result for SHA-256 52062be7aef2166a…

MALICIOUS

PDF

97.1 KB Created: 2020-11-28 20:49:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: edf957830ae697c3214cfd5591d161c0 SHA-1: 99fa2198321d48efe8639337f86b88040a686b23 SHA-256: 52062be7aef2166a11a586c091c0535cf464bfa76ef3cce045f86f0e1fd0ef76
156 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 embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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://traffine.ru/aws?utm_term=autoradio+android+per+audi+a4+b8 PDF link annotation
    • https://mudujisobugabe.weebly.com/uploads/1/3/4/5/134511382/pulajuwefuweg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459341/normal_5fad9ecd266bb.pdfIn PDF document text
    • https://bogadisosupotaj.weebly.com/uploads/1/3/0/7/130776541/84dce24.pdfIn PDF document text
    • https://zirufifun.weebly.com/uploads/1/3/0/8/130874679/zumadamezela.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/novifamigot/mystic_messenger_frank_email_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/53424156308.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/agenda_writing_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/59596036312.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/aspera_compressor_catalogue.pdfIn PDF document text
    • https://s3.amazonaws.com/sefukirexuwekij/40940923773.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c55ecd4-697d-49b0-bfd6-45f6eae0bbb4/gobopuzugaretepi.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012a29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A29 2952 bytes
SHA-256: 013fc9f45313cdddd5762e6694753e55f6a85ad2eec225b6e17fd140af1ee5c7
font_01_sfnt_off000134b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134B8 5152 bytes
SHA-256: 27128c85b68669c380c0f7cae7e6669f687f9b0aa57cea830bf30c51757919a8
font_02_sfnt_off00014644.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14644 2264 bytes
SHA-256: e0da664fd6de993538708acb17e5ee70d4d90577e2ecc432fd2540831768d512
font_03_sfnt_off00015079.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15079 11616 bytes
SHA-256: 3d8e194d14ee72e3aeddb4d83c6e375ef35310f75fbef1ebd1e382bab5b698a1

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