Malicious PDF — malware analysis report

Static analysis result for SHA-256 05aae6a65a599a8e…

MALICIOUS

PDF

76.2 KB Created: 2021-03-20 06:24:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: e25e8551ad4beefd8e89111c33ad66bc SHA-1: e74c6a1c3b83f7257ffa3a1f1b31b2ef46466c7b SHA-256: 05aae6a65a599a8e441284b92c254591c2022c4299c6a1ba20f7cc9925267b13
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are associated with link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, contains text related to 'Nexus mods witcher 2 saves', likely a lure to entice users to click on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://pelibifir.ru/strik?utm_term=nexus+mods+witcher+2+saves PDF link annotation
    • http://safijejog.mygamesonline.org/html5_and_css3_tags.pdfIn PDF document text
    • http://pasikufopubiwo.mypressonline.com/dufurofizizaniwek.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501198/normal_600247b47c432.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381756/normal_6045ef416823c.pdfIn PDF document text
    • https://cdn.sqhk.co/bolomadu/gigiYif/picture_description_worksheets_for_class_1.pdfIn PDF document text
    • https://cdn.sqhk.co/fipexuwebo/ij5id6Q/cheadle_college_bursary_form.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/idhehjt/puzzle_mazes_more_apkpure.pdfIn PDF document text
    • http://saroforati.medianewsonline.com/zatinidixawexutaz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477167/normal_6008b7850ed31.pdfIn PDF document text
    • https://cdn.sqhk.co/kewawukufiju/giRgjD7/age_of_apes_mod_apk_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368481/normal_5fc94f5126f82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426280/normal_6036b16e34b74.pdfIn PDF document text
    • https://cdn.sqhk.co/vuritukupus/Dghjiie/ruzapakewunalawu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418401/normal_60152c0575abb.pdfIn PDF document text
    • https://cdn.sqhk.co/bigulikexupa/iiSPUAg/levumo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481695/normal_5ff7803e07cca.pdfIn PDF document text
    • https://cdn.sqhk.co/kajemuwasutu/MohjgfR/luwukagolazavemegez.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472495/normal_5fcdfd55d68bf.pdfIn PDF document text
    • https://cdn.sqhk.co/konafomaz/vcjfYhb/bejesuzomulup.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb82f61c-1c24-4ebf-a9a9-17f22f1793e4/acordes_para_teclado_el_espiritu_de_dios_esta_en_este_lugar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e8730b9-2d50-4ad0-8d6f-20ee9c004f8c/22947070348.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48bc7948-5b06-4820-b36a-10c7132323b9/98042446327.pdfIn PDF document text
    • http://pelebirepopo.onlinewebshop.net/how_to_use_obd1_code_reader.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_off0000eabe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEABE 5468 bytes
SHA-256: 08d72e8c668ef166a4993e84bff99bf75fcad0dc2762ec7512d0cdc7bba36b01
font_01_sfnt_off0000fd4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD4B 11132 bytes
SHA-256: 05dd8b8d74d2b9bf6074a9070eda9fb765f65183a4f7ddf336a9aa3c29b5d9ff

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