Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fa91568c5cb7525…

MALICIOUS

PDF

38.5 KB Created: 2020-10-08 12:44:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 14945cad5845ebf4ae4b770a90fb065f SHA-1: 100479c9fbd99010f1664c6036963cbd879cf725 SHA-256: 9fa91568c5cb7525c7528a516bacd3a806704f1d3690af24a50762b262f56508
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://ggtraff.ru/strik?keyword=video+maker+fx+templates+free In PDF document text
    • https://site-1040125.mozfiles.com/files/1040125/46080379020.pdfIn PDF document text
    • https://site-1044024.mozfiles.com/files/1044024/mumalefisafanibuxobezu.pdfIn PDF document text
    • https://site-1038401.mozfiles.com/files/1038401/lanurovukat.pdfIn PDF document text
    • https://site-1038963.mozfiles.com/files/1038963/peranenas.pdfIn PDF document text
    • https://site-1038982.mozfiles.com/files/1038982/bikinijuwaremolopejolu.pdfIn PDF document text
    • http://files.konektis.ca/uploads/1/3/1/8/131857981/2708115.pdfIn PDF document text
    • http://marigo.postmodernpanic.com/uploads/1/3/1/8/131858685/9aae5e69dc1.pdfIn PDF document text
    • http://nigizofe.theodoravarnayjones.com/uploads/1/3/0/7/130775050/fanuvezu-fogosotalam-fozaronu.pdfIn PDF document text
    • http://files.rachelelizabethmyers.com/uploads/1/3/1/6/131637854/3676dcc7307d42e.pdfIn PDF document text
    • http://laxoxa.stalbansbees.org/uploads/1/3/1/4/131408864/judumavenagon-gotufaxij-wimulima.pdfIn PDF document text
    • http://files.theelephantstudio.com/uploads/1/3/1/4/131453465/2b082a24899c84.pdfIn PDF document text
    • http://mazir.hibajaroudi.com/uploads/1/3/2/7/132712324/fd534a23dd.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/fe3cdf36-9d91-4447-8023-5d769402054e/xitidu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4faca367-167d-4041-88ef-f5a21dbb9cd5/vapawu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85bc36c8-1e44-42f7-a47d-37d5e733a3cc/29272163783.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f36366e4-beec-424d-9f51-b26d7a6f0fca/44974559146.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_off000057a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57A9 5284 bytes
SHA-256: 199778482f962b6daf013a7a5c469e1f640f8097c0fdea814b82f93ceb685f2a
font_01_sfnt_off00006995.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6995 10464 bytes
SHA-256: ffecd6defa4f7eab32a0fb72b9cf43204a001d79e5ada94aee3a5f8bd3fc802a