Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f3c16c7c0485055…

MALICIOUS

PDF

34.7 KB Created: 2020-11-03 15:50:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 9abda32ae25fcdeb9b046ed85ad57785 SHA-1: 05de3213b24832fabfe46fd4e3659b081e6c904e SHA-256: 5f3c16c7c048505501865d9ef434d85694c469edaef8002324f16cc99ffc621c
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.me/123?keyword=1999+coleman+fleetwood+pop+up+camper+manual In PDF document text
    • https://vuxarujetununo.weebly.com/uploads/1/3/4/4/134437765/wugexug_nomejejitezoka_zutes.pdfIn PDF document text
    • https://wagimudo.weebly.com/uploads/1/3/4/4/134475497/316133ded25d4.pdfIn PDF document text
    • https://donodofi.weebly.com/uploads/1/3/1/8/131856097/lamasiwunon.pdfIn PDF document text
    • https://wetejitaxazis.weebly.com/uploads/1/3/4/3/134306742/nozabediwuxowef.pdfIn PDF document text
    • https://bulipabuwalo.weebly.com/uploads/1/3/4/1/134131868/temuridusesase.pdfIn PDF document text
    • https://tubenuluni.weebly.com/uploads/1/3/1/4/131437864/6870013.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413239/normal_5f9f173f629ea.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/generador_citas_apa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/449e8397-a426-4937-a4f1-11ae634f52c0/gaditimawemujilove.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_off000048e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48E0 5328 bytes
SHA-256: df520214fd84b3d92458ffca08732355822d8fe2d0cdcb7035e8a41764bbefc8
font_01_sfnt_off00005b05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B05 10792 bytes
SHA-256: 7be3e924bb3ef56b585a860c58cf356fd74a8277ed912060339b19ce1e2e9349