Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cae8ba7589c95a5…

MALICIOUS

PDF

39.7 KB Created: 2020-10-04 16:15:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: a9787a88b5ef4e914c10413fcd1a1d95 SHA-1: 30d27ff5df5cd2978aa74f4230f81de1b89f4ef0 SHA-256: 2cae8ba7589c95a59267f569b25d49e5ed33f2ae5694723937ccdbadcf28342e
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/pify?keyword=lehigh+valley+railroad+buffalo+ny In PDF document text
    • https://site-1044104.mozfiles.com/files/1044104/zotedabi.pdfIn PDF document text
    • https://site-1036960.mozfiles.com/files/1036960/perinov.pdfIn PDF document text
    • https://site-1040346.mozfiles.com/files/1040346/77984074138.pdfIn PDF document text
    • https://site-1037166.mozfiles.com/files/1037166/63014569096.pdfIn PDF document text
    • https://site-1039748.mozfiles.com/files/1039748/fesuriwijejijutuj.pdfIn PDF document text
    • http://rupubore.catsmeowvarietyshop.com/uploads/1/3/2/6/132680835/fivixumiliwisog.pdfIn PDF document text
    • http://konumele.followtheleaderedu.com/uploads/1/3/1/3/131383483/lugesusopeponizawi.pdfIn PDF document text
    • http://files.truestthreads.com/uploads/1/3/0/9/130969710/b37ae2a192477b.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/8db8fa1a-4b5b-4bf8-bb94-fc64a3d14dc0/moxabafusobafovav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f270dd8e-e403-4a0f-90f9-96ef520ef5e3/guxilizikasogija.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77b33181-9b72-4a5c-94ad-aa0a7f77424c/dusubode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcdd5daf-9d96-4657-b85e-c836bc91f81f/jijuvo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63a340bd-de63-4fd7-907e-83247be616e8/55981874280.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/214239ba-7e92-4b80-932f-7cca81508f36/82476337075.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_off00005f00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F00 5236 bytes
SHA-256: 6fdebbe6430e97791f6d9264c96bdc535a08acfebbcbea740f6440ed6287c91c
font_01_sfnt_off000070db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70DB 9804 bytes
SHA-256: c8c83366afa9cf61f12c69dda222f490d369f943e0564a946889464d17f0f3b4