Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ae8cd041b0b7bb6…

MALICIOUS

PDF

65.6 KB Created: 2021-02-26 19:22:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: b098812b6cb0d12d66355abe65b6a1b7 SHA-1: ee50fcac3cbe8087b3d81d7fa37167be0ee83f2d SHA-256: 4ae8cd041b0b7bb62e6309255af4e7d5ae352551d08956e53d65cc07613da50c
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://lozipotod.ru/award?keyword=mfj+949e+deluxe+versa+tuner+ii PDF link annotation
    • http://bumawusuka.mypressonline.com/jabidiputumapuwawumonupoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479454/normal_603822c6d2412.pdfIn PDF document text
    • http://requiredjokblog.com/72164848393vdbya.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459325/normal_5ffcc5c0cb3c8.pdfIn PDF document text
    • https://cdn.sqhk.co/jolodovi/RZ6yzhf/business_management_books_2019.pdfIn PDF document text
    • http://zaxevef.getenjoyment.net/briggs_and_stratton_550ex_oil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489414/normal_601d3681a40cf.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/tedowafomaru/windows_server_2012_r2_standard_oem_iso.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/vujozovajupotokaj.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/tunobewavofi.pdfIn PDF document text
    • http://dakafatuvuguviz.atwebpages.com/what_are_the_greek_symbols_in_math.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_off0000c3aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3AA 5352 bytes
SHA-256: 04a55c8a4d7b63962b188fe1eee6b02d3f197132d4fe04eed3ed6872f9b13b11
font_01_sfnt_off0000d60e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD60E 10592 bytes
SHA-256: 5df951df0df65d7a3d037d4aeebf3c79711a0211d0465b1dda26a54b187a5763