Malicious PDF — malware analysis report

Static analysis result for SHA-256 361de494bf2f3d89…

MALICIOUS

PDF

38.8 KB Created: 2020-10-04 01:48:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 3d00e6ab788a0a98c274033fd670f3f3 SHA-1: df2c64a0fb315cfdf81d78c8c2afad31185088cc SHA-256: 361de494bf2f3d897da023dbcdc351af3d78b3c438f7151ee69a330c6bb0d13f
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=concept+mastery+routine In PDF document text
    • http://files.millhousefloristry.co.uk/uploads/1/3/1/4/131438464/279a3a.pdfIn PDF document text
    • http://files.lesingealchimiste.com/uploads/1/3/1/4/131438217/b2468267c7f465.pdfIn PDF document text
    • http://files.lcm4christ.com/uploads/1/3/1/6/131606631/demagosiloxa.pdfIn PDF document text
    • http://wagazif.sarkabuchlstephenson.com/uploads/1/3/1/6/131607208/joxawoz_vobemoz.pdfIn PDF document text
    • http://dofutov.louannbauer.com/uploads/1/3/1/3/131379808/pewajoxune-pasunulezetir-mitetabulizovab-mowubakodipiwe.pdfIn PDF document text
    • https://site-1036926.mozfiles.com/files/1036926/19836531865.pdfIn PDF document text
    • https://site-1036855.mozfiles.com/files/1036855/bolow.pdfIn PDF document text
    • https://site-1036799.mozfiles.com/files/1036799/kifawoxutokoxovub.pdfIn PDF document text
    • https://site-1041779.mozfiles.com/files/1041779/37923192799.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/3f070987-6aab-44ad-b8ee-f1353f08b1ee/2271256510.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5532e49e-bba7-4683-b7bf-30be341710e6/98321870605.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_off00005b33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B33 5056 bytes
SHA-256: 0bb3fa781969a8f0e21e9fc638d1c8a26693b933d85bfc401dbc34eb3720fe43
font_01_sfnt_off00006c4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C4E 10384 bytes
SHA-256: d230c6da3e984a222cf032d006ebd6f651f7c30bd4d68cf1d0489dffbcd3a880