Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bba55dd59381165…

MALICIOUS

PDF

71.2 KB Created: 2021-03-27 14:39:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6240f2bf7ce0ed028b6c3334779a474e SHA-1: dbc1ddfae44049e9c9eb365eac788c5d63f1f094 SHA-256: 5bba55dd59381165cc181b9060c2d8311c64be11f6b89693c2ffea6e4a62afcc
156 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or trojan delivery mechanism. The PDF contains a large number of external links, many of which point to other PDF files, suggesting a link farm or redirection strategy. The primary malicious URL identified is https://soxebez.ru/wix?keyword=spooby+t+rex.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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/wix?keyword=spooby+t+rex
    • https://jatisarekitikez.weebly.com/uploads/1/3/4/6/134661612/tafuwunitukowepuk.pdf
    • https://jazediwugitali.weebly.com/uploads/1/3/4/7/134730671/7687130.pdf
    • http://br1.red/sample_performance_evaluation_phrases_for_employees7o8tr.pdf
    • http://asia.kiwi/monster_girl_encyclopedia_wiki_kobolduyax0.pdf
    • http://tojumuwuluso.iblogger.org/maths_app_graphing_calculator_pro_apk.pdf
    • http://pollsexpert.com/21271150163hhc0n.pdf
    • https://rixutabenenik.weebly.com/uploads/1/3/4/4/134498467/kotepivufe.pdf
    • http://lavka-karamel.ru/biguanides_davispdniy.pdf
    • http://lnstagram-blue-ticks.com/add_note_to_walmart_grocery_orderp23ox.pdf
    • https://simisasokudu.weebly.com/uploads/1/3/4/2/134235492/9818020.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://c78267de-509c-4cb0-9394-6b21b7876e04.filesusr.com/ugd/290ce3_2b3b663ebcb9463aa34b91797360ae0c.pdf?index=true
    • https://ea29520f-fefa-4c12-ab21-0e0839e82572.filesusr.com/ugd/5d2047_c74f71be639645a1bdd24a343de1338c.pdf?index=true
    • https://feedbc21-cb93-402c-9ae2-3476589645d2.filesusr.com/ugd/f3ecbe_aac150d89141413591110f37b057ae1f.pdf?index=true
    • https://71fc3d66-43b2-4ae0-adc3-dfbcdf8b5360.filesusr.com/ugd/6605a0_028fac9261454ac382f251d3fa00eefe.pdf?index=true
    • https://72cee60b-533f-4fda-9f40-87b1bb6f0553.filesusr.com/ugd/590778_3ab7158d005646a3ab01870a9705e72b.pdf?index=true
    • https://e8e87dc5-637d-47ba-9de6-e7d98d123d78.filesusr.com/ugd/a69a03_8afe5e89194048de8ff89d766b07608a.pdf?index=true
    • https://02408c19-b9f6-4996-a596-1d5b7e46c8d3.filesusr.com/ugd/c83fdb_97449cc4b54241e5994bda82036562c0.pdf?index=true
    • https://d99d9bf7-a5e0-49f2-90ac-0d1bc881463d.filesusr.com/ugd/0182ef_1c9edbc2c4fb4f57ab9ef68e27865f45.pdf?index=true
    • https://5a20c861-23fd-468b-888e-078c5342874f.filesusr.com/ugd/924841_e8aa9c608e84431e9c9b44224e693dab.pdf?index=true
    • http://jikapepikedamum.epizy.com/sivamivadezuwe.pdf
    • https://1923692e-f727-4f58-80a8-3583160180e3.filesusr.com/ugd/c4ccc4_9fc2ef88806c42858dc0c8b821a0bd4a.pdf?index=true
    • https://e114ad41-1367-46fe-a5fd-427bf640f69d.filesusr.com/ugd/a63c55_9fed9591daf5409fada78cec3d3f6576.pdf?index=true
    • http://jefesati.rf.gd/reglamento_local_de_las_asambleas_de_dios_republica_dominicana.pdf
    • https://e1c07d4e-6587-4767-b76f-5dea9cf3e327.filesusr.com/ugd/51a829_2ef983f5207b4e22b69cb5c8c6d399ba.pdf?index=true
    • https://ecf1b359-4982-44d9-836f-7e6f5fec4aa1.filesusr.com/ugd/da15c8_b97664e9d6944e23903b283ad536b708.pdf?index=true
    • http://tibupud.epizy.com/bergen_social_media_addiction_scale_questionnaire.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_off0000db93.bin
aefe03a8e43eddcecc2b27c2a34638e154c42b31c0bb06b728a540273a90494a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB93 4804 bytes
font_01_sfnt_off0000ec02.bin
fd50bbe0910ad3f55518deec08870a4709a13c9508be0a131c0757a00104139e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC02 10388 bytes

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