Malicious PDF — malware analysis report

Static analysis result for SHA-256 54fcb5715d39887c…

MALICIOUS

PDF

68.5 KB Created: 2021-01-20 11:22:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 031a376a58143a8a9c844ac329950dff SHA-1: 377f7024efc9ffadb9dc0cd36a24c5532da4a066 SHA-256: 54fcb5715d39887cee25482236959610549647ed85af35a7df2077a963998fb8
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://seumenha.ru/wb?keyword=spider-%20man%20rope%20hero%20gangster%20new%20york%20city PDF link annotation
    • https://cdn.sqhk.co/gasajolop/p5iiHhb/pakagozixajavawisep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374188/normal_5fab877bde842.pdfIn PDF document text
    • https://cdn.sqhk.co/bewewojiwo/oyb9fii/stickman_warriors_4_online_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/jawuraxexije/j6Yghhg/best_trivia_app_ios.pdfIn PDF document text
    • https://mamufitixiru.weebly.com/uploads/1/3/4/6/134640278/133620d8e9.pdfIn PDF document text
    • https://zoguripan.weebly.com/uploads/1/3/1/0/131070442/dadonedadavigunib.pdfIn PDF document text
    • https://sejimewopokotas.weebly.com/uploads/1/3/5/3/135350214/nuzufe.pdfIn PDF document text
    • https://gejowarog.weebly.com/uploads/1/3/2/7/132740172/5817036.pdfIn PDF document text
    • https://watowerapomos.weebly.com/uploads/1/3/0/7/130775357/fawirekatowobik_lebubev_vidibuvawiwev_dixetupupekene.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464873/normal_5fdc492283a37.pdfIn PDF document text
    • https://cdn.sqhk.co/savadapo/hgdHpha/tagubemosowijukodaxelage.pdfIn PDF document text
    • https://ledajesaler.weebly.com/uploads/1/3/4/0/134041179/2452064.pdfIn PDF document text
    • https://nojokuvevufig.weebly.com/uploads/1/3/4/1/134109253/tuwodugososavovesav.pdfIn PDF document text
    • https://cdn.sqhk.co/rinilafexowi/ptjePaC/wobuguxolufozev.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/lakadutof/kemubekudewitajuz.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_off0000c041.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC041 5848 bytes
SHA-256: 68fdb65d3e0dfb3c1f9acb1f1fa23bc8317b8f73208c031bd532c6a333d76977
font_01_sfnt_off0000d41a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD41A 15232 bytes
SHA-256: 2b037a68d8be0c92ff9f0761da9c07fc4a983a505cc0c406e932222a5a8cba53