Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b4b8d658a357b59…

MALICIOUS

PDF

72.7 KB Created: 2021-02-27 23:28:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: cbd26dd4ea6a53577f48e33fe8bfc471 SHA-1: 56ac89d73e764ba22c10952b7e7aef5476eb5225 SHA-256: 4b4b8d658a357b59db189fd9863b3c85d1564b960a75a6500c3a818c44a6bc44
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://jacksth.ru/award?keyword=ue+boom+app+can%2527t+find+speaker PDF link annotation
    • http://luxasireku.sportsontheweb.net/5749521932.pdfIn PDF document text
    • http://lamakexo.scienceontheweb.net/robefepipizumalozakokived.pdfIn PDF document text
    • https://luruxelu.weebly.com/uploads/1/3/2/6/132682974/29e281d2ce4d.pdfIn PDF document text
    • http://juxaxukavaxi.iblogger.org/nukopuxetevusut.pdfIn PDF document text
    • https://sizuginoten.weebly.com/uploads/1/3/4/4/134490660/gudovupuko.pdfIn PDF document text
    • https://digavonuvuveg.weebly.com/uploads/1/3/4/8/134851043/6296510.pdfIn PDF document text
    • http://tefitagesev.mypressonline.com/codigo_ascii_de_las_tildes.pdfIn PDF document text
    • https://gadudomarun.weebly.com/uploads/1/3/4/7/134705140/zopebida.pdfIn PDF document text
    • https://jupedarer.weebly.com/uploads/1/3/2/8/132815187/6245910.pdfIn PDF document text
    • https://cdn.sqhk.co/fenazijeguk/hgRhbje/muneneratidinipusojuxufak.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/jakujakula/lusobujo.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/bruce_lee_south_movies.pdfIn PDF document text
    • http://gosaduzunake.myartsonline.com/what_were_the_3_agricultural_revolutions.pdfIn PDF document text
    • http://lidumadinub.epizy.com/mr_brahmachari_songs_kuttyweb.pdfIn PDF document text
    • https://s3.amazonaws.com/xopugup/mapepadevepuwale.pdfIn PDF document text
    • http://varuxaze.epizy.com/drugs_society_and_criminal_justice_4th_edition_ebook.pdfIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/best_books_2018_non_fiction.pdfIn PDF document text
    • http://xisebugiraji.epizy.com/53452402612.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_off0000e1d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1D7 5496 bytes
SHA-256: 513bf0f026b2c3f9e72a52c89b39b27e79d4704f2a16da2f1f6af45b9d29174a
font_01_sfnt_off0000f47f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF47F 9732 bytes
SHA-256: b5742fccfa3728970259a4a2a509e1b40fea221731d5b04dd18dd70a852416b7

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