Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4a328c18909938c…

MALICIOUS

PDF

71.5 KB Created: 2021-02-28 23:35:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 4be0064c25ea011af36c4b5247373895 SHA-1: d0f57de34d1060efcd3add6ecad401255c205b1f SHA-256: c4a328c18909938c72db01c9be4d2061c67ba301b6710d18044f2d50ef6312eb
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://xajibur.ru/award?keyword=facts+about+the+great+depression+wikipedia PDF link annotation
    • http://tulomodev.getenjoyment.net/95427123310.pdfIn PDF document text
    • https://cdn.sqhk.co/difixoruze/hjd0oq3/talking_cat_sylvester_gets_paid.pdfIn PDF document text
    • http://xegazinijitup.mywebcommunity.org/9708588583.pdfIn PDF document text
    • https://zuwexonoporij.weebly.com/uploads/1/3/5/3/135317719/josazuxej.pdfIn PDF document text
    • https://vifatogiso.weebly.com/uploads/1/3/4/3/134316440/puzodubijujeposulot.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388406/normal_5ff9cb8b2505c.pdfIn PDF document text
    • http://vumonivaxozutod.mypressonline.com/sepesejarijijoganiju.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rixigor.onlinewebshop.net/introduction_to_post-quantum_cryptography.pdfIn PDF document text
    • http://puredaw.rf.gd/14022375319.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_off0000dc30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC30 5552 bytes
SHA-256: f043df9c3ebf971692b6499c934f464072684343469e9bb7b22d886821d61555
font_01_sfnt_off0000ef1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF1A 10012 bytes
SHA-256: b543ba07122927f0a9c4513718c6e14625d5ea93bb61da936f2ccc45fe4e100f

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