Malicious PDF — malware analysis report

Static analysis result for SHA-256 c38752e5365760fb…

MALICIOUS

PDF

78.7 KB Created: 2021-04-09 05:05:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 2a2811d5cc6637dcad92c18eaffe4b80 SHA-1: e170f91c0bbd45e5958c0f1fb4580ee2036db9ea SHA-256: c38752e5365760fbf7ffe6147a597e07c0d53b25dd3038633d147da871bf036a
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates it functions as a link farm on disposable hosting, with one primary malicious URL identified: https://lozipotod.ru/strik?utm_term=the+dragonbone+chair+reading+level. The presence of embedded URLs and the nature of the heuristics suggest this document is designed to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lozipotod.ru/strik?utm_term=the+dragonbone+chair+reading+level PDF link annotation
    • http://mebovedu.getenjoyment.net/social_issues_and_environment_assignment.pdfIn PDF document text
    • http://espacecmb.xyz/favekegudetofazuxawame0squz.pdfIn PDF document text
    • http://asia.kiwi/engineering_mathematics_ken_stroud04xyx.pdfIn PDF document text
    • http://uplrezina.site/7a-_8_crossword_answersf77z7.pdfIn PDF document text
    • http://sujimelowakolop.medianewsonline.com/rukedixoviluros.pdfIn PDF document text
    • http://najolilu.iblogger.org/jiwalimi.pdfIn PDF document text
    • http://bewudewumit.sportsontheweb.net/jnv_admission_form_2020.pdfIn PDF document text
    • http://jepewadagamer.scienceontheweb.net/rti_form_format_in_marathi.pdfIn PDF document text
    • http://triple-doska6.club/tuwopivekidajwifr.pdfIn PDF document text
    • http://mavigawika.scienceontheweb.net/levamojuzolenojepiluvebov.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://c2093f15-f4fb-4bda-9582-db5404103fa6.filesusr.com/ugd/b28561_3e5e9abfe36b4b22bafd4b37c8fbf87a.pdf?index=trueIn PDF document text
    • http://tolerikaduvutef.rf.gd/banner_saga_2_apk_obb.pdfIn PDF document text
    • http://kenozajawatulaw.rf.gd/neptunia_rebirth_2_item_guide.pdfIn PDF document text
    • https://ded05c8b-f0d8-42bc-a64b-daa0b63394ca.filesusr.com/ugd/99afdc_bfb3fa38507549bcaed0177857c0c2fa.pdf?index=trueIn PDF document text
    • https://e5058785-d3d1-442e-b0ad-d0045053dde7.filesusr.com/ugd/17c622_b6d7f262a61e47c995c1bc618fbc0ebf.pdf?index=trueIn PDF document text
    • https://82e7f058-9c2a-4352-8e65-a162d98cde11.filesusr.com/ugd/ba3c76_597088b724ce4c9faf82c3833e7907c9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd5c3ea1-da63-47ad-92a1-9e5f5dd03ac6/data_structures_in_c_geeksforgeeks.pdfIn PDF document text
    • http://sirilamezowi.epizy.com/82500172473.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84de9444-3e1f-43e9-9547-42bc67a9f2ea/62450482842.pdfIn PDF document text
    • https://27a83426-c768-4525-a63d-b5b732cca755.filesusr.com/ugd/28b3f7_e6c44c7ed339480e8a37f7d8af040f9e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/748e93d8-8579-47f6-8d52-5df82cdd9e6a/suwelosus.pdfIn PDF document text
    • http://zuxokoberibaw.atwebpages.com/bodybuilding_program_for_mass.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0afcbff-922d-4e84-8aeb-91d89ac7b3a7/el_diario_de_greg_4_libro_completo_en_espaol_para_leer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09065154-d593-4d4f-9272-83af7fa22939/forezuves.pdfIn PDF document text
    • http://naburonip.myartsonline.com/88149929302.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA87 4880 bytes
SHA-256: c33e410f91370b741c440f2680958aba748ff34eed268f28b0f47c7d19d77169
font_01_sfnt_off0000fb0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB0B 10680 bytes
SHA-256: 2ea893998be65b6235f54a790914d5bdb582d515612f6ed2a76e47a152ded06f
font_02_sfnt_off00011ef9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EF9 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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