Malicious PDF — malware analysis report

Static analysis result for SHA-256 43e2861949852581…

MALICIOUS

PDF

37.5 KB Created: 2020-11-08 22:11:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 7c64672384d2ea6f5f570edab5a699e6 SHA-1: 1ecfe2ac4ed5a62db1f06f31092beb2138696551 SHA-256: 43e2861949852581a741ee089d48fcf1649160e7601b19cd51ea1c5794731c42
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://traffking.ru/123?keyword=trippie+redd+a+love+letter+to+you+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4421200/normal_5f9c963541963.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405899/normal_5fa840d769016.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458623/normal_5fa3a07f8eb7d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://bejagidet.files.wordpress.com/2020/11/vekezujuj.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/46794332772.pdfIn PDF document text
    • https://vulopadur.files.wordpress.com/2020/11/kabudeveluropol.pdfIn PDF document text
    • https://s3.amazonaws.com/pomaxa/45582125825.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e69da92-ce1a-426d-8f6d-35b729df1f07/dyson_dc17_manual.pdfIn PDF document text
    • https://rujimalik.files.wordpress.com/2020/11/67234744132.pdfIn PDF document text
    • https://feluxeb.files.wordpress.com/2020/11/xubobalatamuro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8f269bc-beb6-4970-b6af-bf1d48b775f8/answers_to_m9_service_pistol_nko.pdfIn PDF document text
    • https://juxabugu.files.wordpress.com/2020/11/kadiduzi.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_off00004f00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F00 4980 bytes
SHA-256: b4555e3537fa05b39475bb1c8826df31717db456ccd8afd794ffd5d74d439fcc
font_01_sfnt_off0000601b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x601B 12528 bytes
SHA-256: 7c83e36710c08f0fdba0d87676be190de97370c7f3146637da012cda387b38b8