Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d72d0da85afff9f…

MALICIOUS

PDF

38.8 KB Created: 2020-10-16 22:12:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 84f8f3873bfdf48bf7a002450c351a3b SHA-1: 71dcb9e2e7d606683b86fcb6962c0bf960ea9935 SHA-256: 5d72d0da85afff9f4ea2079657034e3b4502f1ed46e0d08f86c03b0aaa97e6a4
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://ttraff.me/123?keyword=electromagnetic+spectrum+worksheet+coloring In PDF document text
    • https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/fe9f3f43fa3.pdfIn PDF document text
    • https://jizonuwuko.weebly.com/uploads/1/3/0/8/130814311/kowokojig_xinepelefus.pdfIn PDF document text
    • https://besiwalufeg.weebly.com/uploads/1/3/2/6/132696214/4e62bca4882baf.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/3731638.pdfIn PDF document text
    • https://povutepumik.weebly.com/uploads/1/3/2/7/132741486/4952957.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/5058540.pdfIn PDF document text
    • https://xedaliwim.weebly.com/uploads/1/3/1/4/131454603/jasenufi.pdfIn PDF document text
    • https://godadonalizubo.weebly.com/uploads/1/3/1/4/131437317/nurisaga-giwebibibo.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/debizikirapanas.pdfIn PDF document text
    • https://wovasemuzusalej.weebly.com/uploads/1/3/1/6/131636629/d48df64aff82ac.pdfIn PDF document text
    • https://jeponiruwapin.weebly.com/uploads/1/3/0/7/130776483/5721191.pdfIn PDF document text
    • https://vikumeniwexawud.weebly.com/uploads/1/3/0/9/130969440/fubof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367007/normal_5f87739820281.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376856/normal_5f89c122e8009.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/1/0481/1338/5635/files/rezunejuvinijikimemaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5440/7580/files/tank_trouble_4_unblocked_games_66.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3571e918-fe23-4966-9230-5fca5fa1ecea/9945160339.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e725aee2-9a9e-4ff0-9d8a-db068c8de423/40116586825.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfbab42b-d2e0-4faa-a63b-de7b25ef375f/13715879296.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_off00005ad4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AD4 5460 bytes
SHA-256: 3ea18e5faf8c8a2eeddb9f2868e78f9adef4594d704d319fb7ff7a30913d7a83
font_01_sfnt_off00006d4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D4D 9412 bytes
SHA-256: bff323a2d0648835c8f2a89e6e27eb398204ba07eec3170dc21cd2f1f6256f7e

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