Malicious PDF — malware analysis report

Static analysis result for SHA-256 4343f50ab8349e8f…

MALICIOUS

PDF

77.1 KB Created: 2021-03-20 07:48:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9db68fda9c54ffc080a2370093ab9f0b SHA-1: 1a0144e716859ea42bd02738ce6b012ef4966268 SHA-256: 4343f50ab8349e8f109d087fde73fcc09cb57b278ccc852b8cc47c8b68898133
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://ponafet.ru/strik?utm_term=how+to+empty+dyson+big+ball+animal+2 PDF link annotation
    • http://ribipoxufepe.iblogger.org/google_account_set_up_android.pdfIn PDF document text
    • http://tekupugu.sportsontheweb.net/21052236201.pdfIn PDF document text
    • http://xesukifogenabe.iblogger.org/edexcel_igcse_biology_notes_2020.pdfIn PDF document text
    • http://tesilav.sportsontheweb.net/budgeting_and_budgetary_control_in_public_sector.pdfIn PDF document text
    • http://moradudipomibo.mypressonline.com/giger.pdfIn PDF document text
    • http://voninizi.iblogger.org/marvel_contest_of_champions_forum_apk.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/vipinib/zefidodekejuditigojalon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd5e2b84-e57f-43fc-8544-39dcb965fe1f/lujodiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/461ffdf0-73ba-4dd6-b276-51afe19d920c/whirlpool_gold_quiet_partner_iv_control_board.pdfIn PDF document text
    • http://kesewoge.rf.gd/25728485000.pdfIn PDF document text
    • http://tebexuvizo.rf.gd/47433951778.pdfIn PDF document text
    • http://bupozefi.epizy.com/converse_plataforma_bota_ulanka.pdfIn PDF document text
    • http://nowimirozox.atwebpages.com/broiler_production.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f8fa529-be06-4f02-b5b2-967559ebd7b9/48302466039.pdfIn PDF document text
    • http://jogisav.epizy.com/bohol_diy_travel_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71bd8e96-56b7-4bf8-a8ab-75cc77018a4c/37547895982.pdfIn PDF document text
    • http://kivabidugitu.rf.gd/surixudozuxanikemekowuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ee99a54-591a-4214-9172-1ffa2b6080e0/diablo_3_switch_eshop_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/charitable_trust_registration_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a19ec9cf-02c6-4fa5-8dc0-3599831379d5/mechanical_behavior_of_materials_dowling_4th_edition_solutions.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_off0000ea37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA37 5608 bytes
SHA-256: f2e61d9be22ab5f720f3ba0d62f2f0ee12842156180e503d69fdc368802577c9
font_01_sfnt_off0000fd52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD52 11776 bytes
SHA-256: 457bb97fefc725ae3969acfc00c3d86e9a2f43017fe9fc7a01165e8f4f962d23

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