Malicious PDF — malware analysis report

Static analysis result for SHA-256 8720773bb01ad369…

MALICIOUS

PDF

86.3 KB Created: 2021-04-27 06:15:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: baa4d46da20bfc82b65749e101c86735 SHA-1: 923307c971c6397d11baf778a7581e02d7a99075 SHA-256: 8720773bb01ad3690e491a8d462bc14e30fe631725cc8169fa09d6e57764197e
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with a primary suspicious URL pointing to 'soxebez.ru'. The document body, though partially garbled, suggests a lure related to a manual, which is a common tactic for phishing or malware distribution. The presence of multiple disposable hosting links further supports a malicious intent.

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 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://soxebez.ru/strik?utm_term=jlab+jbuds+air+sport+manual+espa%25C3%25B1ol PDF link annotation
    • http://pitikudefojeken.getenjoyment.net/romogojukegomep.pdfIn PDF document text
    • http://kemutedetabu.scienceontheweb.net/menekifuvatodu.pdfIn PDF document text
    • http://xidufefonudug.sportsontheweb.net/52146633243.pdfIn PDF document text
    • http://gojazot.22web.org/android_asset_studio_background_images.pdfIn PDF document text
    • https://bodarisijusafu.weebly.com/uploads/1/3/5/3/135383154/4599996.pdfIn PDF document text
    • http://dugarudewemudo.sportsontheweb.net/sanitary_fittings_catalogue.pdfIn PDF document text
    • https://vipapesad.weebly.com/uploads/1/3/4/3/134369303/4867229.pdfIn PDF document text
    • http://gexuniganije.iblogger.org/english_to_tamil_dictionary_apk_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sulorowanutabu.atwebpages.com/55665002657.pdfIn PDF document text
    • http://borufaf.rf.gd/mapa_africa_fisico.pdfIn PDF document text
    • http://buzezozamedat.rf.gd/desercion_escolar_en_secundaria_mexico.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c4905c3-bbf8-4eeb-b6db-507306bad00e/electrical_engineering_technology_vs_electrical_engineering_technician.pdfIn PDF document text
    • http://suluzaruweg.epizy.com/cutting_edge_3rd_edition_intermediate_teacher_s_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3f29868-a6f7-4048-bd78-90feb885bfea/41956881161.pdfIn PDF document text
    • http://sorisavitekinuj.onlinewebshop.net/5649485706.pdfIn PDF document text
    • http://judejelalub.rf.gd/bb_pilipinas_2017_question_and_answer.pdfIn PDF document text
    • http://sevavaxup.rf.gd/miseruxagorumowek.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f38d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF38D 5524 bytes
SHA-256: b687a368ac7785fda89568420985c5990adcf7dc0d7ab46fe9b9618ee55fb621
font_01_sfnt_off000105f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105F3 15856 bytes
SHA-256: 7d2c16d87107a3c21ca90d14bc3ca83d9f2acbe2a3c4decd95fa2dcb5850fdb7
font_02_sfnt_off000134ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134EF 16116 bytes
SHA-256: f8e326b96df6c0457890c6346fd7f60b91beb129051a642dbd03fdf119a21fd7

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