Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceff305315e85f66…

MALICIOUS

PDF

37.9 KB Created: 2020-10-01 09:42:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 0936b872fffcbb9a5d340aca29745d5f SHA-1: d8b195810eb94adb37a5a17698d283f2123b7cff SHA-256: ceff305315e85f66972c5fbdea632cea641fe07f2eb7043b2cebf1be7743d4d9
224 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://gettraff.ru/strik?keyword=sistema+bethesda+para+informar+citologia+cervical+2014+pdf In PDF document text
    • http://files.azamericansaddlebredfoundation.org/uploads/1/3/2/3/132303086/vigof.pdfIn PDF document text
    • http://files.hopeinelgin.com/uploads/1/3/1/4/131452804/6715026.pdfIn PDF document text
    • http://files.ocwpublishing.com/uploads/1/3/1/3/131381240/porixinukorod.pdfIn PDF document text
    • http://files.mindfulmobilelearning.com/uploads/1/3/1/3/131379948/zefobidobaj.pdfIn PDF document text
    • http://gapoto.redwood4h.org/uploads/1/3/0/9/130969525/nanuva_xofol_zurobuxelupete_jodidabitito.pdfIn PDF document text
    • https://site-1036988.mozfiles.com/files/1036988/5083542202.pdfIn PDF document text
    • https://site-1036851.mozfiles.com/files/1036851/83706504554.pdfIn PDF document text
    • https://site-1039577.mozfiles.com/files/1039577/27235947426.pdfIn PDF document text
    • https://site-1036855.mozfiles.com/files/1036855/94579103974.pdfIn PDF document text
    • https://site-1037275.mozfiles.com/files/1037275/kutevarelipiwajuti.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1330/0647/files/chromosomes_and_human_heredity_study_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6186/2810/files/high_school_lab_report_conclusion_example.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1695/1704/files/fafafom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7772/9432/files/19092975328.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0174/0439/files/jemebotuzavori.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_off00005258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5258 6284 bytes
SHA-256: 1701cb97a328164f28fa007f2e322ed2ed5098dfe3fb230f0da4436aabcaeb37
font_01_sfnt_off00006794.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6794 10140 bytes
SHA-256: 1eeb31ac40d8ce56a7774c10c6eeb2b07a23f2a5b9e8f1b988d75032a9a68181

Open this report in the interactive analyzer, or submit your own file for analysis.