Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e998c927812e2c6…

MALICIOUS

PDF

79.1 KB Created: 2021-03-31 05:16:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9e9ff9f06c07129c4b4af994ec0acd10 SHA-1: cc018109e0747e33eb8a394fa83a8e7e03c8fdf9 SHA-256: 4e998c927812e2c6d7830327b87d5f633b897c2712d47bab0609c6973cd86ac6
156 Risk Score

Malware Insights

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

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 0.9998

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 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.
  • 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/award?keyword=schwerbehindertenausweis+antrag+pdf+d%25C3%25BCsseldorf PDF link annotation
    • http://tujugebisuxilun.22web.org/estadistica_para_administracion_y_economia_anderson_8_edicion.pdfIn PDF document text
    • http://zewugivufo.22web.org/tricks_to_solve_mole_concept_problems.pdfIn PDF document text
    • http://noxivivixuza.22web.org/pan_application_form_download.pdfIn PDF document text
    • https://cdn.sqhk.co/bebumila/p5yIlIo/bulleh_shah_kalam.pdfIn PDF document text
    • http://xibiselid.medianewsonline.com/psychrometric_chart_for_engineering_thermodynamics.pdfIn PDF document text
    • https://cdn.sqhk.co/togixulala/cnhdCja/bed_sheet_definition_english.pdfIn PDF document text
    • http://xapaponagegite.22web.org/68749342340.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/xetasif/91139371546.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/76449883714.pdfIn PDF document text
    • https://6d428a25-da86-44fa-8f13-5b0f09742281.filesusr.com/ugd/3649d2_c7927d87979b44ac9c3bd816981923f6.pdf?index=trueIn PDF document text
    • http://sudexixurijaxoz.atwebpages.com/ncert_accountancy_book_class_11_part_2.pdfIn PDF document text
    • https://s3.amazonaws.com/leributafa/38657526116.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/xotobelaviwi.pdfIn PDF document text
    • https://s3.amazonaws.com/bamepofewalada/anew_ultimate_multi-_performance_eye_system_ingredients.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/ms_word_templates_for_brochures_tri_fold.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/kusotivasazizirimemixil.pdfIn PDF document text
    • https://a97cc435-ef8e-4ffb-8544-4b9c0bda5a6e.filesusr.com/ugd/7ab440_dfa20d57a680418e9f51dc850c09c345.pdf?index=trueIn PDF document text
    • https://d12e84a0-9808-45da-82c6-613dfe540d1b.filesusr.com/ugd/dc8a8e_aaa5b74c748a432db479850571ef39a5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tunenijexe/what_is_a_synonym_for_not_listening.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C7 5872 bytes
SHA-256: a44b3f395796eaac2c81946b93a359ea8d265542e6d15d71c4c8dee09dcbf17f
font_01_sfnt_off0001059c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1059C 12052 bytes
SHA-256: d67543373681dcd33146bf6130788d415a6ac2e9498f9b808e5928c20472fd22

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