Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae49d8e48a985935…

MALICIOUS

PDF

75.3 KB Created: 2021-05-02 07:22:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c4d7177afba4851cf07453ed7a129018 SHA-1: 9dd3bbd8a038d3c98307fbc1e817307a60309f67 SHA-256: ae49d8e48a985935341d548996949577c137b255de22ff6c65af9a7db4abfa99
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. 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 0.9999

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://botokaw.ru/strik?utm_term=weber+bbq+gas+lighter PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4470035/normal_606899751db13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482618/normal_5fd0e4271ee40.pdfIn PDF document text
    • http://xekugesakurupab.22web.org/traducir_de_ingles_a_espaol.pdfIn PDF document text
    • http://henrysavbr.site/pokifoot0ia.pdfIn PDF document text
    • https://cdn.sqhk.co/zikonidenijo/vsJZhcF/11338993040.pdfIn PDF document text
    • http://joy-todays.online/83959241138vpzx5.pdfIn PDF document text
    • http://monubaz.iblogger.org/cosco_shipping_holdings_company_limited_annual_report.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/Cnjdbf2/international_marketing_notes.pdfIn PDF document text
    • http://hdvideo.design/42962757259qlkh8.pdfIn PDF document text
    • https://cdn.sqhk.co/vadezewe/Vgfheji/daketexijorazonij.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kesobikifa.epizy.com/household_gold_book.pdfIn PDF document text
    • http://jutebef.rf.gd/bath_and_body_works_online_application.pdfIn PDF document text
    • http://dezazikep.epizy.com/angaar_bengali_movie_link.pdfIn PDF document text
    • http://xumizimewimapa.epizy.com/trufa_70_cacau_show_informao_nutricional.pdfIn PDF document text
    • http://vakorizu.epizy.com/king_henry_viii_school_coventry_ofsted_report.pdfIn PDF document text
    • http://xilavugepiw.rf.gd/writing_sample_for_phd_application.pdfIn PDF document text
    • http://datufubizut.rf.gd/how_long_should_you_cook_brown_rice_in_a_rice_cooker.pdfIn PDF document text
    • http://xujogefup.rf.gd/saguragusapuvogogew.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_off0000e6cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6CB 5228 bytes
SHA-256: 4ae5282d29d6404abbe52fd1139a216fb92c02dbddd0fafff4a23d2be67d126e
font_01_sfnt_off0000f894.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF894 11796 bytes
SHA-256: 4a08940da786047871dda9b8b2b6e79ffcef35825b5ea72a76ccca0499fdb8c7

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