Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d1002397b9f419a…

MALICIOUS

PDF

77.3 KB Created: 2021-03-30 09:17:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 2e410169c41d18c7a5446f1b2e493679 SHA-1: 54752d710f1acb1075f99a7f6dd8db0841df0fb0 SHA-256: 5d1002397b9f419a1be2472a755ba4e4aa2a3b7233373a44c8676efd04026dc9
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9997

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://mezovuduw.ru/award?keyword=catarsis+concepto+pdf PDF link annotation
    • http://tonagruz.ru/example_of_experimental_research_design_titlecjq5a.pdfIn PDF document text
    • http://supportcopyright.net/67479712161xqo2i.pdfIn PDF document text
    • https://cdn.sqhk.co/filemowa/hjiaifw/kakomoxeno.pdfIn PDF document text
    • http://rozel.ru/how_to_use_ratchet_straps_by_dirt_farmer_jay6uy02.pdfIn PDF document text
    • http://nupesupo.mypressonline.com/perbedaan_penyakit_arteri_dan_vena.pdfIn PDF document text
    • https://vunisanelebori.weebly.com/uploads/1/3/3/9/133999195/515195.pdfIn PDF document text
    • http://christinaanddavid2019.com/gakosubjxssc.pdfIn PDF document text
    • https://cdn.sqhk.co/gajalalike/jfhfgfW/15362361395.pdfIn PDF document text
    • https://mubasaji.weebly.com/uploads/1/3/4/8/134846322/863443.pdfIn PDF document text
    • https://zizowotedudoma.weebly.com/uploads/1/3/4/6/134641453/4431891.pdfIn PDF document text
    • https://nilemesobipefuj.weebly.com/uploads/1/3/2/3/132303022/wamejaxukuworij.pdfIn PDF document text
    • http://begemot.space/faverememuxuxokarulidon1z6o.pdfIn PDF document text
    • http://compte-cmbretagne.best/jenetigixidadudilijofijiziauv8.pdfIn PDF document text
    • http://copyrighthelp.info/midofigijebekopakry3dq.pdfIn PDF document text
    • https://cdn.sqhk.co/zovitamojim/tihjugh/74878956329.pdfIn PDF document text
    • http://tiktokhd.design/sejenilerkx4gj.pdfIn PDF document text
    • https://femidizori.weebly.com/uploads/1/3/4/6/134684525/begazuvanewas.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/217dac26-b627-4a2d-8a85-debb2e4a7a0b/8064776842.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f1e2576-77f9-485a-a6b2-b9ac81cb0137/swann_camera_cable_30m.pdfIn PDF document text
    • http://radiviwix.onlinewebshop.net/probability_worksheets_7th_grade_with_answers.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_off0000ecf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF2 5024 bytes
SHA-256: 351ff52f6dedfa5e789cf42982721e86f0d7fda9e8f02bc722c2fff91a1b6e50
font_01_sfnt_off0000fe13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE13 12668 bytes
SHA-256: 65a2fffb06364255d519e4784f7e34dfacdc756e6f121d062b964136b2e4d69e

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