Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3ba02818a38cf83…

MALICIOUS

PDF

77.0 KB Created: 2021-05-15 15:04:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ed189f2cdb119fff8b58e09c33bd65e1 SHA-1: dd4c4ae2d9adb28a0ac651a4b878cc95ccca627b SHA-256: e3ba02818a38cf83506541511398fe49eb390dd303fbe82029ca0d77389eb7ef
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 0.9998

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://leonvi.ru/strik?utm_term=what+is+the+best+cordless+trimmer+edger PDF link annotation
    • http://vevaroda.scienceontheweb.net/descargar_diccionario_portugues_espaol_gratis.pdfIn PDF document text
    • https://lopamazaveseku.weebly.com/uploads/1/3/4/6/134643240/6571318.pdfIn PDF document text
    • http://loxiturizule.sportsontheweb.net/47561017387.pdfIn PDF document text
    • http://mavigawika.scienceontheweb.net/what_is_an_active_needs_assessment_tool.pdfIn PDF document text
    • http://tuvosudokalidu.scienceontheweb.net/fokoforurunabivakeb.pdfIn PDF document text
    • http://mapenibo.scienceontheweb.net/biodata_tun_dr_mahathir.pdfIn PDF document text
    • https://mutabezikubi.weebly.com/uploads/1/3/4/7/134739743/50a953eedb7c.pdfIn PDF document text
    • https://muxolebutelun.weebly.com/uploads/1/3/2/7/132741382/rijetalozatuxu-rowoz-woripamu.pdfIn PDF document text
    • http://vazawujuzu.sportsontheweb.net/87569370909.pdfIn PDF document text
    • https://zawasofolebu.weebly.com/uploads/1/3/4/9/134902788/c449fcb46.pdfIn PDF document text
    • https://cdn.sqhk.co/befozaxulot/0ibifHu/lepiredujorofado.pdfIn PDF document text
    • https://cdn.sqhk.co/bapisolel/heKjgih/1599129567.pdfIn PDF document text
    • https://nazuvunu.weebly.com/uploads/1/3/4/4/134438845/latobepomujamaw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pidodexogejax.myartsonline.com/hitachi_65_tv_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/358c84ad-85ca-4c76-96a2-8a2da58b036f/how_to_read_tarot_accurately.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfdb4f77-44e2-4e5c-a038-d862057d2c38/rawakiz.pdfIn PDF document text
    • http://sujunutab.atwebpages.com/tokave.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c039df87-7ebb-45c4-aa0d-c84d2f8df704/firazepabosufakepubo.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_off0000eef8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF8 5508 bytes
SHA-256: 6e3edd6a7ac971504cef8682d3fe31f0c78fb59046eca994632675d33dc61833
font_01_sfnt_off00010185.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10185 10768 bytes
SHA-256: 7173bf1836b59a339bc21f06d8a5bdd78e93fec647ef2148ccc9122a67f8e1ac

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