Malicious PDF — malware analysis report

Static analysis result for SHA-256 3acc3c4cc9d440b9…

MALICIOUS

PDF

38.9 KB Created: 2020-11-03 12:57:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 8c8cb298d5b0d9af29206e9ed1dadc0b SHA-1: 464bb0bbdd8fe81db7b2a3c5725676061a7de4c5 SHA-256: 3acc3c4cc9d440b907505ef4b17eb51404ea90bfbd67aa32b17a2a769f81ce63
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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=gattaca+movie+assignment+worksheet+answers In PDF document text
    • https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/3049569.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419650/normal_5f9624af431ff.pdfIn PDF document text
    • https://sabopedawexidix.weebly.com/uploads/1/3/4/3/134305122/pifalujuvasewamu.pdfIn PDF document text
    • https://jefapijuwenumik.weebly.com/uploads/1/3/4/4/134435530/pixin-neguvufaju-judimudipefuwe-jobapixow.pdfIn PDF document text
    • https://jamuseramomuf.weebly.com/uploads/1/3/1/8/131871426/40376599.pdfIn PDF document text
    • https://suganolorifumu.weebly.com/uploads/1/3/0/8/130814011/eeb6f.pdfIn PDF document text
    • https://xofuvavafifibib.weebly.com/uploads/1/3/4/3/134386759/9483660.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0458/7090/7569/files/vitixuziw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/7254/2662/files/38342177789.pdfIn PDF document text
    • https://s3.amazonaws.com/wovigebi/arabic_writing_practice.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_off00005813.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5813 5428 bytes
SHA-256: f531ab0a85f8e89d03eba4659a24411ca77fc56b59e2f50b83056feb882b9a6c
font_01_sfnt_off00006a79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A79 10760 bytes
SHA-256: 340588538a524c3873c843b04f38cc2c2de7773fe4023e1be22e2bd3b22e3106