Malicious PDF — malware analysis report

Static analysis result for SHA-256 0de03d25f82f51a9…

MALICIOUS

PDF

76.6 KB Created: 2021-03-12 10:10:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 096d9da8579fb553383f6b97207fe958 SHA-1: 5006361976d2286b77001d396224fac9e702bd1f SHA-256: 0de03d25f82f51a914842cabef6c70056305838ed80bc80c70ef933ad3f53539
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, indicating a high likelihood of malicious intent. The primary malicious indicator is the presence of a large number of external links, with one prominent URL pointing to 'soxebez.ru'. While no scripts were explicitly extracted, the PDF structure and link farm suggest an attempt to redirect users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://soxebez.ru/123?utm_term=citra+emulator+games+free
    • http://kitukotobov.medianewsonline.com/colombo_development_plan.pdf
    • http://tipofeliluget.medianewsonline.com/65831437122.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://625f08e2-3d8e-45b5-8e8c-b95d001c5c7c.filesusr.com/ugd/d94ae5_4b88dd065e3b4c3d9bbeba632940545e.pdf?index=true
    • https://uploads.strikinglycdn.com/files/92bf9ca3-4489-4a67-8f89-34035acadac8/fios_router_blinking_white_then_red.pdf
    • https://aa3bb5c3-2bd4-4791-9e2a-6e31d5009b04.filesusr.com/ugd/60e703_2f25194224a2422e8e305a52cd4670b4.pdf?index=true
    • http://vejaxekeni.epizy.com/is_the_yellow_birds_a_true_story.pdf
    • https://s3.amazonaws.com/veraxawewib/metarhizium_anisopliae_taxonomia.pdf
    • https://uploads.strikinglycdn.com/files/5ea3c073-60ed-4566-ae3b-792b13329261/73627160779.pdf
    • https://uploads.strikinglycdn.com/files/419afcb2-44b8-44c3-acaa-4c243aa6e996/ginufisedeketadel.pdf
    • https://uploads.strikinglycdn.com/files/5131aad5-3323-4ea1-9f9e-425bf9762452/breville_scoop_factory_ice_cream_maker_manual.pdf
    • https://s3.amazonaws.com/mafavuzenoliki/kabafixujevibubudakadakom.pdf
    • https://uploads.strikinglycdn.com/files/d12f9882-ff00-45cd-a58f-f45e3ca8c3de/clasificacion_de_las_cuentas_del_balance_general_nif.pdf
    • https://uploads.strikinglycdn.com/files/4ad98e76-e5e1-4d40-b572-7b6a90d2c3da/wananu.pdf
    • https://uploads.strikinglycdn.com/files/75995fa3-8932-426d-a212-a71001858855/cuanto_vale_un_metro_cuadrado_de_tierra_en_colombia.pdf
    • https://s3.amazonaws.com/jenagubadopi/ak_47_punjabi_song_audio.pdf
    • https://99442e0c-e188-470f-b1e9-a2082f9e7f28.filesusr.com/ugd/2274a7_82f0c2ba60b2423d87fc5b778b88cf36.pdf?index=true
    • https://uploads.strikinglycdn.com/files/4db50c30-1c43-4b3e-8bb5-c1e1db77b95f/what_are_the_female_saints_names.pdf
    • https://s3.amazonaws.com/lekezaru/69947309842.pdf
    • https://77483064-5892-4b52-b419-66e751946b77.filesusr.com/ugd/ef7b09_31ce77f95a7b41419b23b9c012f281f6.pdf?index=true
    • http://tevoburowuvule.epizy.com/41867343933.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eeae.bin
8fc240fc4fe4d9959ba919b9fd4df296fbfb03e07c03729d86bb14413955a7d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEEAE 4992 bytes
font_01_sfnt_off0000ff8e.bin
a0da7a033bda09649c80185797f2d82be1ab547ceacd59824f3f7c6802b08d8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF8E 11028 bytes

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