Malicious PDF — malware analysis report

Static analysis result for SHA-256 e025f877f31b0faa…

MALICIOUS

PDF

66.5 KB Created: 2021-02-20 08:40:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 92879af3761e776d4c25c291d4aa3429 SHA-1: 7fc3d3a0bb55862a3123ac63c073ea3aa0e1779e SHA-256: e025f877f31b0faab3b5cc62be42a2d37673330cf2e7a215d8e123cdfa996bac
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified as a link farm, likely intended to redirect users to malicious websites. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to exploit users through deceptive content, potentially leading to phishing or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://leonvi.ru/strik?utm_term=brother+hl-l2380dw+owners+manual PDF link annotation
    • http://bottlechainworld.com/56323997467q61gu.pdfIn PDF document text
    • https://lufisadoxusixa.weebly.com/uploads/1/3/4/5/134583632/5e9c82d4d06042d.pdfIn PDF document text
    • https://cdn.sqhk.co/loberutebe/fngfYYG/zemipebimugelofo.pdfIn PDF document text
    • https://cdn.sqhk.co/xudekutof/iegfii9/alien_zone_plus_unlimited.pdfIn PDF document text
    • https://buzijivugaza.weebly.com/uploads/1/3/4/7/134709386/sevuraku_nerebegu_kojonire_pozemin.pdfIn PDF document text
    • https://cdn.sqhk.co/desixurate/ghjCwiq/tusoje.pdfIn PDF document text
    • https://jutifakakunule.weebly.com/uploads/1/3/5/9/135985430/xogivafiv.pdfIn PDF document text
    • https://cdn.sqhk.co/vuxesojogugu/jjjdiDM/radio_italia_app_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/letinumi/jpwW9hb/dragon_scale_evolution_pokemon_go.pdfIn PDF document text
    • https://cdn.sqhk.co/jijasitov/JieZohh/73097143111.pdfIn PDF document text
    • https://xomugiwonin.weebly.com/uploads/1/3/4/2/134266294/fcbb8b97066.pdfIn PDF document text
    • https://takadoturig.weebly.com/uploads/1/3/4/1/134108809/8298336.pdfIn PDF document text
    • http://8gusevshop.website/glitch_video_effect_appfy3jr.pdfIn PDF document text
    • http://agreevudb.rest/heath_anthology_of_american_literature515u7.pdfIn PDF document text
    • https://cdn.sqhk.co/bamazaludez/Yhchaq7/billie_eilish_4k_wallpaper_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/bamopilu/1jhmWvs/vugabusameletizovewari.pdfIn PDF document text
    • https://cdn.sqhk.co/turaxulefa/5u6Ugdm/70760928635.pdfIn PDF document text
    • http://docita.fun/ripitamasavirokadegulat1gk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000c3fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3FE 5868 bytes
SHA-256: 8bdaca11edcd09ad081aa1d7650535ea9792997458e1ff35318f0d7afebbcf3d
font_01_sfnt_off0000d7de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7DE 11080 bytes
SHA-256: 10ace661f88afa85c2f2b4af6f8b1d504120b746cdf045d55da3d13b0ab229bb

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