Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fdb5044305a33f9…

MALICIOUS

PDF

44.2 KB Created: 2020-10-10 12:11:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: f9eeb643a218dc6973d0db276a9b6aae SHA-1: e061d2f3fbbd27004aa1b1641b3fe25e9d07525d SHA-256: 0fdb5044305a33f978b8dcc7d4650a9b49e757e7e11f1ae6ca2cc0b94275a6c5
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/strik?keyword=ged+2015+practice+test In PDF document text
    • https://site-1038618.mozfiles.com/files/1038618/badodexux.pdfIn PDF document text
    • https://site-1036879.mozfiles.com/files/1036879/mexagimazirotaxided.pdfIn PDF document text
    • https://site-1037054.mozfiles.com/files/1037054/75239540330.pdfIn PDF document text
    • https://site-1043335.mozfiles.com/files/1043335/sarividafo.pdfIn PDF document text
    • https://site-1038725.mozfiles.com/files/1038725/52987412879.pdfIn PDF document text
    • http://vexizi.puppyregistrationpapers.com/uploads/1/3/1/4/131453723/muleponeme.pdfIn PDF document text
    • http://wazax.dentalinstrumentcenter.com/uploads/1/3/0/7/130776276/fotuzon_zutapomuvexewil_vomoxizotinimo_pomofoxowo.pdfIn PDF document text
    • http://files.icclconference.org/uploads/1/3/1/6/131637896/6940288.pdfIn PDF document text
    • https://site-1042185.mozfiles.com/files/1042185/konezubunuvar.pdfIn PDF document text
    • https://site-1039549.mozfiles.com/files/1039549/sigeko.pdfIn PDF document text
    • https://site-1037890.mozfiles.com/files/1037890/nowopikid.pdfIn PDF document text
    • https://site-1038904.mozfiles.com/files/1038904/vuderamominog.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/44e115d3-03b6-4baa-a763-b42686b13f77/99532094649.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87ad34dc-04b6-4161-83b4-110541256bc4/3917751589.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94f3a96b-ca39-4b41-a359-276ab3e46150/bizolafixopesi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ed56231-67bc-46c3-96bf-656754b9af20/kixaviwejemadasuje.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_off00006d06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D06 5516 bytes
SHA-256: b07ddee84a123b86733a38a96e48fc3f28f386fcc2a21a5258a76d57931802b4
font_01_sfnt_off00007fe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FE3 10632 bytes
SHA-256: 872582cec30001ba532bba6488307dc3a72c7266065ec747d82f73e3fe791232

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