Malicious PDF — malware analysis report

Static analysis result for SHA-256 b717b0e9a5afed96…

MALICIOUS

PDF

125.9 KB Created: 2021-04-20 08:35:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 1e4314d54f641be589ac588950eb55bb SHA-1: e91d927c993f0346fd46b3538b4e6eaa6f8de029 SHA-256: b717b0e9a5afed96b9e336fff824bb9bc0dfbf8c34f6505a0f5f45ec241a8251
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs that redirect to a link farm, indicating a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags this behavior, suggesting the document is designed to host many links on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

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://baarspo.ru/strik?utm_term=warhammer+40k+9th+edition+full+rulebook+pdf+download PDF link annotation
    • http://afracheat3.xyz/9195350111xgahq.pdfIn PDF document text
    • https://salexutoxor.weebly.com/uploads/1/3/4/7/134761189/tibafovabi.pdfIn PDF document text
    • https://keziputaxa.weebly.com/uploads/1/3/2/7/132711938/39ca249ada49.pdfIn PDF document text
    • http://webmastervlad.ru/2008_chrysler_town_and_country_transmission_replacement_costa6sby.pdfIn PDF document text
    • http://salonop.xyz/jizozzqfff.pdfIn PDF document text
    • http://weareanonymous.org/35973398692y3k9v.pdfIn PDF document text
    • http://abanca-electronica.com/28048164648i3we1.pdfIn PDF document text
    • https://wodaxudufusan.weebly.com/uploads/1/3/0/8/130814186/d78d7e96.pdfIn PDF document text
    • http://gedadekenoz.mywebcommunity.org/fetavazumavimije.pdfIn PDF document text
    • http://lnstagramcopyrightcenter.com/sharepoint_2013_view_workflows_in_progressyvbu9.pdfIn PDF document text
    • http://plafond.xyz/tercera_estrofa_del_himno_nacional_honduras8j0co.pdfIn PDF document text
    • http://geekcods.com/hks_ssqv_installation_manualk2i56.pdfIn PDF document text
    • http://vuletotam.scienceontheweb.net/learn_hebrew_alphabet.pdfIn PDF document text
    • http://centerbluebadge.com/lifesaving_society_distinction_award_guidexbh4f.pdfIn PDF document text
    • https://sijudunewofas.weebly.com/uploads/1/3/4/6/134696620/0f1d96ac62dd50.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rivekutunuji.rf.gd/no_one_is_alone_piano_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/012364b9-7ee4-44fe-a602-c6c7cd6f4ef8/how_to_program_hampton_bay_low_voltage_transformer.pdfIn PDF document text
    • http://zepakom.rf.gd/56781097245.pdfIn PDF document text
    • http://tixerewolulas.rf.gd/itemised_quote_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9f1eb9b-7d64-4643-8f87-31d85108d6a5/69793246467.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f198e0f1-eae6-4151-b01f-724b889dd0e7/mifipavilebefagubuniz.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_off0001aee0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AEE0 5800 bytes
SHA-256: f39c128fe1295d19459ac3dc471ff638eaf7e2a77d3e8813844125197056ff6d
font_01_sfnt_off0001c288.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C288 11724 bytes
SHA-256: 5c33338223bf7de84c9537ac2b6f7655e20594fa9427ed59317f96ce9e2ab930

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