Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef73b2bf31b93b44…

MALICIOUS

PDF

39.6 KB Created: 2020-09-30 02:54:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: bf72533f50b8fc0a9a2f49d272495f7e SHA-1: db659363e27a99181ca4b0323156047197cf525a SHA-256: ef73b2bf31b93b44f72763843226548d2179d5e2461f6026c0a55e01757d55cf
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://gettraff.ru/strik?keyword=adulterants+in+sugar+pdf In PDF document text
    • http://files.cedarcreekinternalmedicine.com/uploads/1/3/0/7/130739239/xuxorub-zaval-limomawakiro.pdfIn PDF document text
    • http://files.feliceabarr.com/uploads/1/3/2/8/132814024/4587eb18f.pdfIn PDF document text
    • http://favon.littlegreenjeep.com/uploads/1/3/1/4/131407469/6f07a0010ce8.pdfIn PDF document text
    • http://tapaxada.nicholastoddshumate.com/uploads/1/3/0/8/130874277/54ddfe0b3ab1.pdfIn PDF document text
    • http://wovate.andwhilewewait.org/uploads/1/3/1/3/131382243/bitawijom.pdfIn PDF document text
    • http://namal.uglypixelicious.com/uploads/1/3/1/3/131398091/babobivewal.pdfIn PDF document text
    • https://site-1036689.mozfiles.com/files/1036689/25764555435.pdfIn PDF document text
    • https://site-1037061.mozfiles.com/files/1037061/pajawapufoxojewijonefegi.pdfIn PDF document text
    • https://site-1036880.mozfiles.com/files/1036880/35650327924.pdfIn PDF document text
    • https://site-1037202.mozfiles.com/files/1037202/wukizonujadifapodij.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/c371736d-11fe-445a-ad13-109bf01653fa/56625606667.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ba10f1e-010b-4e99-bb69-6b83dc6216bd/vekabesubenewipa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3167c62-bf67-4d48-b8a4-ba15876fd787/fadajukoxujesero.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/548758fa-917d-4a5f-9b3f-c4d7b24c5c3f/pijexavid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5de279ab-2f0e-424e-9d1d-473fd489f8e2/71374589958.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005623.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5623 5200 bytes
SHA-256: 6fdef74feb0a0aa6d526b23949325fecdffcf120341f7ab05c9dbfae001db1d3
font_01_sfnt_off000067e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67E3 13336 bytes
SHA-256: 5f1ca2f5442321d1bb66f02a1361f3e44070a4264028516bc74f030ccb69db8e

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