Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f74a595317359f2…

MALICIOUS

PDF

83.6 KB Created: 2021-05-15 06:46:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 72cc17e3e48b2c2ffb69c05e1af681c8 SHA-1: 8ff44911e8438a55f5f51541c5789084abd4a698 SHA-256: 9f74a595317359f2e17efdb08fc09cd0b565e82f3f8a9bed0bd18fb0f80f832b
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 0.9970

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuzutuzo.ru/strik?utm_term=cuales+son+los+sintomas+de+la+prostata+inflamada PDF link annotation
    • http://nejevefivi.mypressonline.com/awk_tutorial_download.pdfIn PDF document text
    • http://rajajime.mypressonline.com/24302316498.pdfIn PDF document text
    • http://nuzarekuzugav.mypressonline.com/nivejivotowakelo.pdfIn PDF document text
    • http://degimogug.mypressonline.com/mapa_de_carreteras_de_mxico.pdfIn PDF document text
    • https://cdn.sqhk.co/kovezozeseg/g1FBFhd/ice_cream_summer_frozen_foods_pvt_ltd.pdfIn PDF document text
    • https://cdn.sqhk.co/woxemevimox/ZLgdhc9/mcdonald_s_breakfast_menu_calories_chart.pdfIn PDF document text
    • http://mowilobo.22web.org/easy_adirondack_chair_plans.pdfIn PDF document text
    • https://cdn.sqhk.co/gaxomawelej/MfjaigN/auction_sniper_free_download_revdl.pdfIn PDF document text
    • https://cdn.sqhk.co/zamokaxu/gc3IsvU/orcs_vs_mages_and_wizards_free.pdfIn PDF document text
    • http://jovefupe.mywebcommunity.org/18804969642.pdfIn PDF document text
    • http://xisalokowifob.22web.org/budget_contingency_plan_template.pdfIn PDF document text
    • https://cdn.sqhk.co/kizofapekeku/1VgejiU/viduxusonobebos.pdfIn PDF document text
    • http://medazuxa.mywebcommunity.org/how_long_does_the_keratin_complex_smoothing_treatment_last.pdfIn PDF document text
    • http://memimusisat.getenjoyment.net/52241978775.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vutogebufuz.myartsonline.com/povojebufuvajalojuwe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0eec785-9599-4ef6-8bb7-d65e8fd2d517/sijenabekujafil.pdfIn PDF document text
    • https://528a8416-53f4-4693-bcf0-540471887af1.filesusr.com/ugd/c3aa89_d71f7d83af7749039768115decf7aa98.pdf?index=trueIn PDF document text
    • https://a1d1c4ac-cf1d-4c58-861c-45d1188f4b60.filesusr.com/ugd/052f3a_7e4bc6c80c5c429caf1fe7200522d895.pdf?index=trueIn PDF document text
    • https://f3dcd8e3-6656-4b47-a81e-a993d3c4f2a1.filesusr.com/ugd/aa9ef2_d419180454d6453e8c59940c9c8a698b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f653fa94-3cad-406c-8391-cb618eaccb0c/dell_optiplex_gx280_video_controller_drivers_windows_7.pdfIn PDF document text
    • http://rofijig.rf.gd/all_the_things_you_are_piano_solo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fcd5a27-12f8-428c-8b7a-ebae4e390706/19708529691.pdfIn PDF document text
    • https://4bc473c2-84d0-4913-8b4e-281bf44fba2e.filesusr.com/ugd/a25dbd_87a4d8f04374471ab0c47f0004c6785a.pdf?index=trueIn PDF document text
    • http://xabudavadeguvo.myartsonline.com/rufavifovovinesaza.pdfIn PDF document text
    • http://riberudedanute.epizy.com/effective_interest_rate_excel_template.pdfIn PDF document text
    • http://sonupon.epizy.com/46174505662.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_off000104dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104DC 5092 bytes
SHA-256: 622024ba337531f816d443f7bcedefe303c106296d10caeaa2934beff69a1645
font_01_sfnt_off00011612.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11612 12700 bytes
SHA-256: 4e536342c08a4987559188f71122581b0f74e3e3d735deb51fff4c36b19d1f4f