Malicious PDF — malware analysis report

Static analysis result for SHA-256 36aabc5b8d82b2dd…

MALICIOUS

PDF

88.6 KB Created: 2021-06-05 19:04:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 31c1db820e1db34c0b9a1274d3ee0940 SHA-1: 944b07642f5ddd8d4e70d1163f9e7564f2054edc SHA-256: 36aabc5b8d82b2dd752b57b71ddece229827c72ef4a0ff082be334776c67c863
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'soxebez.ru', which is likely a phishing or malware distribution site. The PDF structure and embedded content suggest it's designed to trick users into visiting this external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://soxebez.ru/123?utm_term=about+us+template+html5 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4473656/normal_601078b73c34d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389376/normal_60503e12c082b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476580/normal_5fd3886738c56.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410222/normal_5ff7690ad6ef1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383334/normal_604131f9a00fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419218/normal_5fd0f8663fad6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498971/normal_5fca8fa6311ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495843/normal_605ee90bee8c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427086/normal_6034c8525d898.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389816/normal_6059c0667cddb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420917/normal_5fd66ff2e5d9b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404520/normal_600415eb99883.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/134ad9f8-2154-4be9-ab0a-6d7b29473eec/imagery_in_romeo_and_juliet_act_4_scene_3.pdfIn PDF document text
    • http://wuvebag.pbworks.com/f/mejevisugaw.pdfIn PDF document text
    • http://zepadatoju.pbworks.com/f/62045824816.pdfIn PDF document text
    • http://lakebimutep.pbworks.com/w/file/fetch/144415905/90599145744.pdfIn PDF document text
    • http://sizolasipape.pbworks.com/f/27006328167.pdfIn PDF document text
    • http://lulimogosan.pbworks.com/f/procurement_management_plan_for_construction_project_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8599b8a2-b1a6-435c-a38f-adca94dbc173/pigimofazabodejipoxus.pdfIn PDF document text
    • http://mapaduzipi.pbworks.com/w/file/fetch/144603192/60360447003.pdfIn PDF document text
    • http://nugewil.pbworks.com/f/10505068673.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dd9060d-8b06-4ebe-b7a8-2e4bd6c18136/43414190345.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/385c9214-9f16-439c-845b-133a93ab24a2/barbie_moda_mgica_en_pars_pelicula_completa_en_espaol_youtube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5130ac42-a2a6-4c57-845b-6780f865f771/encyclopedia_magica_volume_4.pdfIn PDF document text
    • http://fuzujufod.pbworks.com/w/file/fetch/144663159/19219759195.pdfIn PDF document text
    • http://lomexalipele.pbworks.com/w/file/fetch/144506757/dios_invento_los_numeros.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_off00011da0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA0 5216 bytes
SHA-256: b8fdc6d412d2bdb4273cc830982f62baeb5fe687ddc70ee12fd6c959858bd7ae
font_01_sfnt_off00012f32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F32 11192 bytes
SHA-256: 5b5c1f463a8878d4f9f3ca10b66aa773c83b9620dc4382c139b8f298d7c24b19