Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d0909f3e43603f2…

MALICIOUS

PDF

93.3 KB Created: 2021-03-31 06:52:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 32f39540f06dbd3a9db49533b74cf3a2 SHA-1: d917bb887cf78ce5081b2b2d7d11f9e4a6ad4bab SHA-256: 9d0909f3e43603f2722226455f38b99f1488f58a6ae311d0a822471827656f54
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting, suggesting a link farm or phishing operation. The 'wall street trapper course reviews' in the document body, combined with the external URL, indicates a lure to potentially malicious content. ClamAV and ML classifiers strongly indicate maliciousness, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/strik?utm_term=wall+street+trapper+course+reviews PDF link annotation
    • http://xizugef.medianewsonline.com/ia_maron_calculus_download.pdfIn PDF document text
    • http://jugepawe.medianewsonline.com/20_000_leagues_under_the_sea_free_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1e8c0764-4a0f-46ab-84a2-5f63a8a44928.filesusr.com/ugd/6a0acf_5a4d31111fc84af9bb74188f7b738760.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7fac81e-aa60-473a-9756-cacc84f71912/28207314347.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6ba08eb-c101-47c2-bf2f-fe7afd1a4a4c/friedrich_nietzsche_asi_hablo_zaratustra_resumen.pdfIn PDF document text
    • https://5b3fc17b-a4fb-4144-9a53-ff617e35bc6a.filesusr.com/ugd/696117_36c612dce85147138b2f33aadaf8c61b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb7cb514-31d4-4264-a48b-fbbb360a5b1d/andrew_wommack_ministries_prayer_line_phone_number.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa523c41-0387-4ad3-b3ff-3e5d933d7b4a/signs_of_pimples_on_face.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c8e3554-d9d2-4241-a944-b613e828db12/25874686638.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a455b298-358c-4939-a3d0-f5d0bb1c56c8/86154004796.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed8d2ebb-ab6b-4b40-a99a-ca62c3507259/wirabenelilavid.pdfIn PDF document text
    • http://wivaxodi.onlinewebshop.net/juwudalalimumexadadaporax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c9b5f6a-8918-4644-afbc-96d634e5f5c5/kufozaluwekimevan.pdfIn PDF document text
    • http://likewiwojuxus.atwebpages.com/data_science_and_big_data_analytics_emc_free_download.pdfIn PDF document text
    • http://bejanifezilo.atwebpages.com/69255001918.pdfIn PDF document text
    • https://a9750898-a066-404d-a796-54a2f5ad13bb.filesusr.com/ugd/60231a_d0948774be8b4fa68ac7d75c04dee780.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/adea1a87-9f7d-47b8-b4de-be303afe63b1/90205963315.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d217dd09-9a0d-4730-b039-2dfaba856f34/dolerunonugiw.pdfIn PDF document text
    • https://89d9876f-4e47-4433-ab5b-8da47ae3ae5c.filesusr.com/ugd/37c326_cc7e5159582e44fc824b5fd7146c66b0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c317518-b6a1-466b-b4b3-9be4ccdd34fb/advanced_engineering_mathematics_5th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c253331-bea4-4366-baeb-e7038bb1fa5a/how_do_i_become_a_computer_network_engineer.pdfIn PDF document text
    • https://59bb578d-b312-442a-858b-1a1a54b18a6c.filesusr.com/ugd/c79b1c_d45e9170cff641d6936489d05bf71d8b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e83b6b7-61a2-48ed-9957-925956294486/just_listen_sarah_dessen_age_appropriate.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_off00012da0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DA0 5092 bytes
SHA-256: 9ceee43b08d77a2810c851247b70ece50496959d9f1fbdcdaa5a0b12fb74dfd8
font_01_sfnt_off00013f1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F1C 12264 bytes
SHA-256: 70f1333c32607c3ed8c5b072932df840ff37f1bb8c643e4de47a141c0563efeb