Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f30879b6dc6c62c…

MALICIOUS

PDF

71.8 KB Created: 2021-02-08 23:50:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 64989ef837a5a74e96eab22f90f74656 SHA-1: 6b9e2d1d85a3615329076f968109825121e908c2 SHA-256: 8f30879b6dc6c62c5dde402502ffb7935f7db542386688489ae8c6a44534ece1
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/wb?keyword=antonyms%20and%20synonyms%20worksheets%202nd%20grade PDF link annotation
    • https://cdn.sqhk.co/letinumi/FhNKgiD/60921963990.pdfIn PDF document text
    • https://buxutagugumazas.weebly.com/uploads/1/3/4/0/134095839/wotejapi.pdfIn PDF document text
    • https://cdn.sqhk.co/bedazume/2FiggcP/4424975128.pdfIn PDF document text
    • https://xirejefeju.weebly.com/uploads/1/3/4/7/134723985/8a9693333eb.pdfIn PDF document text
    • https://jewelilug.weebly.com/uploads/1/3/4/3/134331877/637589.pdfIn PDF document text
    • https://cdn.sqhk.co/rukeditele/djhl6hb/65614048647.pdfIn PDF document text
    • https://cdn.sqhk.co/juzurupivepo/hiqlaha/helix_jump_2020.pdfIn PDF document text
    • https://vetasokimatajed.weebly.com/uploads/1/3/5/2/135296406/vimoxoxabomaxo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bupesejirijejus/dikamalewewumudo.pdfIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/88889182239.pdfIn PDF document text
    • https://s3.amazonaws.com/zeworibuzoza/fosroc_expandafoam_safety_data_sheet.pdfIn PDF document text
    • http://gajovab.epizy.com/zilusoxatinomanazowaguza.pdfIn PDF document text
    • https://s3.amazonaws.com/jozaponi/19492173425.pdfIn PDF document text
    • http://xadezifu.rf.gd/manual_barrier_gate_arm.pdfIn PDF document text
    • https://s3.amazonaws.com/desenaz/20513868342.pdfIn PDF document text
    • http://xelidamos.epizy.com/nta_net_sociology_syllabus.pdfIn PDF document text
    • http://lowavizoviwu.epizy.com/5190888313.pdfIn PDF document text
    • https://s3.amazonaws.com/tutasujal/36219844083.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_off0000d999.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD999 5584 bytes
SHA-256: 764e931b8010d2d28084463c3dfbdcaa195443129a7f03e3af7bbbdc24517339
font_01_sfnt_off0000ec8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8F 11124 bytes
SHA-256: 181f8d5542259f51be9cf08d52778a9405329626d5e6f7be72df3d676fb6202d