Malicious PDF — malware analysis report

Static analysis result for SHA-256 4213cd18ef5f3e0a…

MALICIOUS

PDF

60.1 KB Created: 2020-10-01 14:09:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 66d0a5beff7c167b9af66806b7043df0 SHA-1: 65d011f296287348452f7af889d01766c979e6be SHA-256: 4213cd18ef5f3e0a28cb9823d00391c988b6d17d08aed51a7daff88622e11417
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://ttraff.club/pify?keyword=shark+professional+steam+pocket+mop+%2528s3601%2529 In PDF document text
    • http://powuget.wordviewministries.org/uploads/1/3/0/8/130814328/sivegejoxekosifapufe.pdfIn PDF document text
    • http://pagase.stjosephwestphalia.org/uploads/1/3/2/7/132712127/c213b4e.pdfIn PDF document text
    • http://files.unityofpalmyra.org/uploads/1/3/0/7/130775827/0d2098eedc2.pdfIn PDF document text
    • http://fupagi.worstplayer50.com/uploads/1/3/1/8/131856970/mibek.pdfIn PDF document text
    • https://site-1038995.mozfiles.com/files/1038995/wosidaxivoj.pdfIn PDF document text
    • https://site-1037262.mozfiles.com/files/1037262/98536222644.pdfIn PDF document text
    • https://site-1037130.mozfiles.com/files/1037130/tanixetet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/f0d53a29-c28e-431b-b8cb-20c3ebe35611/gavezorolexaxemegovizo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/506a195e-3284-4caa-8830-00ea9b1010c6/baritubejuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c47e5dcc-9e23-41e9-a890-b22b81513a76/10920661571.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3191ae4-1f6d-4dec-b727-9adfbdab3a11/74216634540.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009d18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D18 5876 bytes
SHA-256: 7613ff6fb3e5609a900f740d207abf5e81623b21f46b6f0f7116086b8b10eae4
font_01_sfnt_off0000b0f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0F0 11004 bytes
SHA-256: 6a674919e2edb92b1d0c77f074996bfe0f6535fa9a3bf203c87fa5ed1393f3ce
font_02_sfnt_off0000d599.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD599 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3