Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ab18d571ba27962…

MALICIOUS

PDF

51.0 KB Created: 2020-10-01 04:24:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: fe29fa8e2ee7e57171e78884fa84beb3 SHA-1: f44049c1becd4ae6170994a88bb77e2e95cc9d77 SHA-256: 5ab18d571ba2796230b0bd7be9170ae869836234cb8cb3137e9ec823f0a83486
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://ggtraff.ru/strik?keyword=grammaire+et+orthographe+fran%25C3%25A7aise+pdf In PDF document text
    • http://zejada.lacluenvironment.com/uploads/1/3/1/3/131398348/c934ee819.pdfIn PDF document text
    • http://nolam.candlesinthedarkness.com/uploads/1/3/1/3/131384600/7632085.pdfIn PDF document text
    • http://wobimex.jazzlegaspi.com/uploads/1/3/1/8/131857523/tasanuvuxutovok_tunutujumemar_silom.pdfIn PDF document text
    • http://dokum.svcountingstars.net/uploads/1/3/0/7/130775732/rodifus.pdfIn PDF document text
    • http://fuxeseni.joachimkoops.com/uploads/1/3/2/8/132814930/1702244.pdfIn PDF document text
    • http://mewebes.csroyalty.com/uploads/1/3/2/6/132680835/17a1f94.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/1544b5a3-2a0c-4bba-99f5-e0bd6815224c/4151770316.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9966/8121/files/umbrella_academy_comic.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4815/7859/files/35639771537.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7506/7297/files/xuxanazogolux.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_off00008312.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8312 5636 bytes
SHA-256: 06d60cba70350ba88add27743092ea53b831576ef0c278936a256129fb111826
font_01_sfnt_off00009613.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9613 12712 bytes
SHA-256: 04e13d789c4dfd881e951ea709a64bb5faa1594f1499105230f6641a04457d83