Malicious PDF — malware analysis report

Static analysis result for SHA-256 a76cd109bf189b90…

MALICIOUS

PDF

61.1 KB Created: 2021-02-17 14:21:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: eb4dbf4db8ecf7c38ab9d82a3ecfb7fa SHA-1: 626aaf65f64d32994c460735526bbf2959d9b9b8 SHA-256: a76cd109bf189b90a4fbbe8c4b4e1fc667e868047f9c292b113835b5405bcc9a
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/123?utm_term=2020+ssr+125+price PDF link annotation
    • https://cdn.sqhk.co/dejijadu/TUfK0hj/15838816150.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402956/normal_6022093894248.pdfIn PDF document text
    • https://pabebubi.weebly.com/uploads/1/3/2/6/132695301/9dc5b66f33.pdfIn PDF document text
    • https://jinijazi.weebly.com/uploads/1/3/4/6/134668286/faec72a6b01.pdfIn PDF document text
    • https://xifexovajebim.weebly.com/uploads/1/3/0/7/130740184/9987469.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373983/normal_60229105c9641.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454995/normal_5fc78ec618d14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401515/normal_601867f357f79.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387815/normal_601789cfb168a.pdfIn PDF document text
    • https://rezibaxuxemabu.weebly.com/uploads/1/3/1/4/131453555/xexetejure.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387235/normal_601ab9b970065.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/xoxaneral/93587687198.pdfIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/tugoxexodeli.pdfIn PDF document text
    • https://s3.amazonaws.com/mokamoba/june_tailor_inkjet_fabric_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/section_c_habitat_vs_niche_answers.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_off0000b192.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB192 5040 bytes
SHA-256: 8597beafa999a5a247f9fae3b2e34fe7e5966c53af995c2ad9786f7605d35dee
font_01_sfnt_off0000c2d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2D3 10848 bytes
SHA-256: 4854dd86e99e2a86145cb6b28124b71fb203d5ef506c972c92deeb104769111d