Malicious PDF — malware analysis report

Static analysis result for SHA-256 e748cd7a2fe5d0a6…

MALICIOUS

PDF

43.3 KB Created: 2020-10-30 00:03:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 4aa02579c2ffd6fa965ced5faf25c1b2 SHA-1: c63fe6e134d398e17783ef8fdcde10dd947a09b8 SHA-256: e748cd7a2fe5d0a65c1892e3864dbe1feca6e3d408e135492d3d186209fc8c0e
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/aws?keyword=earth+tones+colors+names In PDF document text
    • https://nizesuvijeva.weebly.com/uploads/1/3/1/6/131607023/5379944.pdfIn PDF document text
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/xetasuzir_dufed_kuluwelari_xomivesude.pdfIn PDF document text
    • https://vagonegasix.weebly.com/uploads/1/3/1/4/131482995/cb1de89623a01d3.pdfIn PDF document text
    • https://rubazepenomul.weebly.com/uploads/1/3/4/3/134324915/2366670.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/xewuj.pdfIn PDF document text
    • https://tenabawik.weebly.com/uploads/1/3/2/7/132710661/wesonilitejobizavi.pdfIn PDF document text
    • https://wegotutitupal.weebly.com/uploads/1/3/1/4/131453182/220039.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402517/normal_5f9a331aea8fe.pdfIn PDF document text
    • https://delimilakemasuj.weebly.com/uploads/1/3/4/4/134400920/gexolepowiw.pdfIn PDF document text
    • https://mefemanodi.weebly.com/uploads/1/3/1/4/131454269/kezonezabam.pdfIn PDF document text
    • https://wavuvavezexa.weebly.com/uploads/1/3/0/7/130775629/kovidomibutezifita.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006afa.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006afa.bin)
    • https://s3.amazonaws.com/kavitokolezub/nefunapofup.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/ejercicios_de_sustantivos_para_secundaria.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 extracted file (font_00_sfnt_off00006afa.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006afa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AFA 4996 bytes
SHA-256: 9c01d627fb25bb47622ab3f59e75cb996278d38c1b194ca4a634c48d64d984e6
font_01_sfnt_off00007bcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BCB 10880 bytes
SHA-256: 54ec63a485ad1dde6eadb7037a062e0b4e1436e5aaf47645de304af9e464ceee