Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a10f5a5e8c1f755…

MALICIOUS

PDF

74.2 KB Created: 2021-03-02 02:54:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: e6a847e584f7174b778ded7a3d422de0 SHA-1: f586ec6d1cc85c3322f20a499d9550ae25ea3e61 SHA-256: 7a10f5a5e8c1f7557c9e8a3bb381aa6b06e63cb98a9e3b999285dcfdfa085fb6
126 Risk Score

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://xezojetit.ru/wix?keyword=licking+county+4-h+band PDF link annotation
    • https://ruxunomitebapat.weebly.com/uploads/1/3/1/6/131606858/jufoxipa-tapulujibebez-nerogij-botosabo.pdfIn PDF document text
    • http://dvigatel.guru/rixibatapk2j7.pdfIn PDF document text
    • https://rufevefiwavanu.weebly.com/uploads/1/3/5/9/135992343/kapebexidiluzizebizo.pdfIn PDF document text
    • https://sakobapo.weebly.com/uploads/1/3/3/9/133999770/5d59e9.pdfIn PDF document text
    • https://cdn.sqhk.co/bosesegivu/Khg8jjJ/logozawitiwug.pdfIn PDF document text
    • https://fawurefo.weebly.com/uploads/1/3/4/4/134441885/8351997.pdfIn PDF document text
    • http://jidojagijubu.iblogger.org/canada_revenue_agency_income_tax_guide_2018.pdfIn PDF document text
    • http://lujadexezusunam.22web.org/dilokavetuzevinibizovov.pdfIn PDF document text
    • http://winwites.space/beretta_92x_f_compact_reviewhbi8t.pdfIn PDF document text
    • http://fruit-ital.space/95315805796ekh7q.pdfIn PDF document text
    • http://jajitefufig.iblogger.org/sun_joe_spx3000-max_electric_pressure_washer_reviews.pdfIn PDF document text
    • http://guferesuzas.22web.org/education_portal_e_kyc_report.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://puligop.epizy.com/forklift_slip_sheet_attachment_for_sale.pdfIn PDF document text
    • http://difuxifomag.rf.gd/22230524947.pdfIn PDF document text
    • http://lamerowed.rf.gd/casio_baby_g_manual.pdfIn PDF document text
    • http://kovejenipo.epizy.com/85807107060.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_off0000e4a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A6 5264 bytes
SHA-256: ae9d332b5446c0d963b51e3e35fac80106ce8cc1590c5b1a777bde549396efb3
font_01_sfnt_off0000f6aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6AA 11308 bytes
SHA-256: 0231334016aa91154a3355aeec465d8bb40169d956df689866128a51a1cfb714

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