Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ba86e44c102825f…

MALICIOUS

PDF

81.6 KB Created: 2021-05-24 08:14:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: c9a0b28486f65a272f00319ab3c71b23 SHA-1: ccc5b10d523a3d05be57e747c195018e53237be9 SHA-256: 4ba86e44c102825fc26d1f0779c3ae17875dc5dd4da3de73e562f3edc1661935
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically identified as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, 'gimoguvi.ru', which is likely used to host a malicious payload or phishing page. The document body, though heavily obfuscated, suggests a lure related to a 'Thule online buyers guide'. No scripts were extracted, but the presence of an external URI in a malicious PDF strongly indicates an attempt to redirect the user to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gimoguvi.ru/strik?utm_term=thule+online+buyers+guide PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fadedosi/words_of_wisdom_to_expectant_mothers.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/50395912043.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/stihl_backpack_blower_br600_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/conversor_pulgadas_a_mm_tabla.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12a94112-3b66-40a5-9073-6284477ebca0/where_is_the_aux_port_in_a_2005_honda_accord.pdfIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/can_you_connect_cricut_personal_electronic_cutter_to_computer.pdfIn PDF document text
    • https://s3.amazonaws.com/jujadodedaruxix/98695895505.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7399077-3122-4e6e-bceb-84838ba82973/mijizoxizotim.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/rise_of_skywalker_visual_dictionary_revan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56c9262a-602d-4a4b-8c9c-b5437b55c063/96852346911.pdfIn PDF document text
    • https://s3.amazonaws.com/lakujusitejojet/zanibovasulepeban.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/politics_for_dummies_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/bizamesuwepe/mathswatch_cheat_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c668a4b5-c985-4d85-a463-132d87072808/i_am_iam_i_am_tattoo_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/midipes/49279661965.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0fc7a2d-d6c7-4e28-b9d8-aae25537dd46/problemas_matematicos_para_nios_de_segundo_de_primaria_con_respuestas.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/wubegegozefajotun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afc72d54-573c-4821-8f45-2716c6198d4e/hp_deskjet_2541_install.pdfIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/biblia_reina_valera_para_descargar_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/xupatedelezufafovikovuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3157363-9176-4d8b-bc7e-734eb9e6e61c/hoja_de_vida_ejemplos_perfil.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010184.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10184 5068 bytes
SHA-256: 857d63573d5fd5b291d1a902d7787ee8ac70df455ae7e323359a77d71d248083
font_01_sfnt_off000112bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112BB 11244 bytes
SHA-256: 4f571ad044cd0a12f70905f33d3d576d748de914a98684aeee115fc94f8648a7

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