Malicious PDF — malware analysis report

Static analysis result for SHA-256 17a3ff06f48cb548…

MALICIOUS

PDF

82.4 KB Created: 2021-05-15 14:41:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 4daa621f641ddc786dbf6b050b6c0052 SHA-1: 22d99563bbbc27b8d54c5f2065ef235a1b5f2158 SHA-256: 17a3ff06f48cb548eab7823f794a28210a54ff9908034cd64c62edf019cd83d7
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The document contains numerous embedded URLs, with several pointing to suspicious domains and one specifically identified as a link farm on disposable hosting. The presence of these links suggests an attempt to redirect users to malicious sites for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://pelibifir.ru/strik?utm_term=best+tactical+fixed+blade+knife+under+50 PDF link annotation
    • http://palopepidek.mypressonline.com/80884782500.pdfIn PDF document text
    • http://motivawka.online/94600516842fy220.pdfIn PDF document text
    • http://vazawujuzu.sportsontheweb.net/mogipepasiregujegigakere.pdfIn PDF document text
    • http://select-get.top/downhill_masters_android26sfi.pdfIn PDF document text
    • http://litvinenko.xyz/verifone_ruby_2_reports1gjei.pdfIn PDF document text
    • http://localdesign.me/399302020485kawu.pdfIn PDF document text
    • http://timecodes.net/rayuela_julio_cortazar_google_drive18sp8.pdfIn PDF document text
    • http://rubewox.sportsontheweb.net/laziferedutuzug.pdfIn PDF document text
    • http://newipufisatag.scienceontheweb.net/mojisewetokanulupej.pdfIn PDF document text
    • http://hookup153.site/23684281787f7qcy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lanosebezazov.onlinewebshop.net/71844871800.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/segikebigo.pdfIn PDF document text
    • https://s3.amazonaws.com/nalifij/discounted_cash_flow_valuation_excel_template.pdfIn PDF document text
    • https://s3.amazonaws.com/paxunu/girlfriends_guide_to_divorce_episode_5.pdfIn PDF document text
    • https://86042ffc-9b62-460b-8552-fb2522205a17.filesusr.com/ugd/4f92c1_7681e0372256460f94b79bcb7edee8a0.pdf?index=trueIn PDF document text
    • https://11fe2947-f393-4df3-905d-f9f3730e834a.filesusr.com/ugd/b1b16e_f71a69777c024cd486fa04173da74a21.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/jiteturenota.pdfIn PDF document text
    • https://7f793f8f-877f-420e-851b-8bae9ea62a4d.filesusr.com/ugd/78c764_7c6a92b56e12454586254c35c8306504.pdf?index=trueIn PDF document text
    • https://fa53e508-d88d-41cb-897c-7a5b6f1bfcc3.filesusr.com/ugd/361045_ded2fe58f0094705908f4cfa35b347e0.pdf?index=trueIn PDF document text
    • https://61df3396-90b5-4b69-a3ae-475c9da6ebc5.filesusr.com/ugd/516574_114a7aefeed843c28795ab8115c0e401.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/34180626574.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_off000102a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A9 5604 bytes
SHA-256: 97ae414cc93d87038e39f4d8e9e4fb5256c8e9ed7a031327d3ff2baa83006258
font_01_sfnt_off000115cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115CF 11300 bytes
SHA-256: f220c0055f79551ac5d4b240eb8e1709c02dec72e21caa4e318c0c5626a7f9ff

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