Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9259d4b856128e9…

MALICIOUS

PDF

41.2 KB Created: 2020-11-08 11:11:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 4bd3bd8922d9a119d02c8244e11ec955 SHA-1: afd49164f5b5ce9cbd561743278b407f7c07ee16 SHA-256: a9259d4b856128e9c299139484ef42e654395488e546f48dfbdb6b799113d827
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/aws?keyword=ghiberti+sacrifice+of+isaac+competition+panel PDF link annotation
    • https://jobubati.weebly.com/uploads/1/3/1/4/131453688/317bbbf.pdfIn PDF document text
    • https://bidukupe.weebly.com/uploads/1/3/4/3/134348295/ea0de34b34.pdfIn PDF document text
    • https://xalusadi.weebly.com/uploads/1/3/4/5/134595224/putivikuxegijim.pdfIn PDF document text
    • https://nijubalalo.weebly.com/uploads/1/3/1/4/131453980/wekebubux_raxibedesosedo_vesasup.pdfIn PDF document text
    • https://fexejolimoti.weebly.com/uploads/1/3/4/1/134131812/1120821.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394068/normal_5f9025636a98b.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/4df4da0b-d237-42ec-9644-bd4ee545c59f/36192243864.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6d5da2c-949f-4ed8-b878-9b91c2871260/14909149732.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/walasuvasebuveberonu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6757e826-8283-4d37-80b8-d4f75be5f43a/35395360283.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_off00006494.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6494 5428 bytes
SHA-256: f42f2d5f1af1da916555ecdee8d01023ce6a81cbbf080897ef2b1fa3d8866915
font_01_sfnt_off000076db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76DB 9824 bytes
SHA-256: 7c5ef516995e758541f5394eb59827ac8cc0787c1adadb81932e1e3dd30af4a6