Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eb9481d6222c625…

MALICIOUS

PDF

77.9 KB Created: 2021-04-16 04:29:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 43e3e05eb04e2bf8b03c864eb0c3c76d SHA-1: 30d7261d4ad56836d6acf39689f9e30a87de8a6b SHA-256: 0eb9481d6222c6251e9e3b8a5c1d64ab822b46fe5ca53c889237b9628388d6df
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://dafemum.ru/strik?utm_term=what+was+the+significance+of+the+temple+in+jerusalem PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4421466/normal_5fc886fb9fc57.pdfIn PDF document text
    • https://cdn.sqhk.co/lonubugogere/jjPjfWy/come_fare_sticker_personalizzati_su_whatsapp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487187/normal_5fce3a3c2ca28.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419628/normal_5ff32259b5932.pdfIn PDF document text
    • http://afracheat2.xyz/believe_synonym_formalhh4fa.pdfIn PDF document text
    • https://cdn.sqhk.co/datawafag/iggcugd/54968260125.pdfIn PDF document text
    • http://molefomisapeput.mypressonline.com/16681852290.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373516/normal_60591b7f75496.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412408/normal_6028a1870d937.pdfIn PDF document text
    • http://gepokupaburorew.mywebcommunity.org/kiss_of_deception_summary.pdfIn PDF document text
    • http://english-10.site/dream_a_little_dream_of_me_sheet_musunrx8.pdfIn PDF document text
    • http://worameruvejaka.mywebcommunity.org/wiguribazukapibatos.pdfIn PDF document text
    • http://agencymedia-ig.com/is_microsoft_project_included_in_office_365_business_standardy9l4t.pdfIn PDF document text
    • http://rivugijunamusi.mygamesonline.org/86607918006.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/muvarelo/70415284381.pdfIn PDF document text
    • https://5d94d51b-2702-4b64-8df3-eadd022f3edc.filesusr.com/ugd/2ddd39_b76e5eb770104094b75bc71d599caa67.pdf?index=trueIn PDF document text
    • http://nibopinalilabaj.onlinewebshop.net/spherical_bessel_equation.pdfIn PDF document text
    • https://3bcdeb60-9876-4d14-bc0a-1dd1632c647c.filesusr.com/ugd/16a96a_50e8941a39914be39c72b0a4040fb89f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nitirew/kepulexovafegexeguwa.pdfIn PDF document text
    • https://s3.amazonaws.com/setigafat/is_acorn_tv_better_than_britbox.pdfIn PDF document text
    • https://s3.amazonaws.com/jirebonudur/biology_laboratory_report_sample.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_off0000f025.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF025 5612 bytes
SHA-256: 2582c8eeaea264b26bb99ba8a75cef0fa12caf824f18e9c20de73823f883e849
font_01_sfnt_off00010333.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10333 10984 bytes
SHA-256: e9a4c9dbfbce2a967122fb0c3c665c9a008164be753d1b8da3138e2174da41ee

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