Malicious PDF — malware analysis report

Static analysis result for SHA-256 45079b90a7777777…

MALICIOUS

PDF

84.6 KB Created: 2021-04-23 10:34:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 0b08913c0c90b67ef1f9001d34b57d7c SHA-1: 23c8bac68278a930dc1429b57d05773310c0517e SHA-256: 45079b90a7777777fd2a2d81edf4b0161f37ca1b3c165ca2bb15b495086fe693
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document, potentially leveraging embedded JavaScript for redirection or exploitation.

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://dugedepap.ru/strik?utm_term=mini+protean+tgx+stain+free+protocol PDF link annotation
    • http://libuwapuvewipev.mywebcommunity.org/basalt_fibre_properties.pdfIn PDF document text
    • http://fanilobepewe.sportsontheweb.net/11026669085.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369923/normal_603fbbe2ec66e.pdfIn PDF document text
    • https://cdn.sqhk.co/majumoros/hdvijyb/85280393625.pdfIn PDF document text
    • https://cdn.sqhk.co/delinilipo/figjjdX/wuxilezupebojekokoj.pdfIn PDF document text
    • https://cdn.sqhk.co/nipigagavadu/ttagegg/49555499651.pdfIn PDF document text
    • http://kalanuso.iblogger.org/30347808201.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371269/normal_5ff75a6609f91.pdfIn PDF document text
    • https://cdn.sqhk.co/jinubodilev/HjcSBlc/golekapovabaked.pdfIn PDF document text
    • http://saniwofixapu.mygamesonline.org/ccsp_cbk_download_free.pdfIn PDF document text
    • https://cdn.sqhk.co/tejurorado/Alhejgg/75458280541.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
    • http://xuwugufufokiti.epizy.com/fofegubifuzaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7da903c-059f-4a82-b7f1-c0fdb21ac5b6/foxon.pdfIn PDF document text
    • http://poxizaxo.epizy.com/bahishti_zewar_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f712ea21-18c2-4a44-aa65-b42463d83896/fafuruput.pdfIn PDF document text
    • http://rowoniwetob.atwebpages.com/lozikez.pdfIn PDF document text
    • http://mamaliloseda.rf.gd/pedajapefopixo.pdfIn PDF document text
    • http://tizivedimusos.epizy.com/biblia_de_estudio_john_macarthur.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_off0000fdd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD4 5044 bytes
SHA-256: d77a94b15bbfd10c60cf6035bd7e3d39460983ac7fa1cc0e6c4c08abe6561280
font_01_sfnt_off00010f07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F07 11916 bytes
SHA-256: fa78abc8fcc657eb884b41b93907936fc76479b2e44d97dcdd5949788db740eb
font_02_sfnt_off00013739.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13739 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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