Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea9f66f9fd450d15…

MALICIOUS

PDF

69.3 KB Created: 2020-10-18 00:24:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: b29ff2ffd7005f4b4480df5bd27f2c21 SHA-1: ebe3bdfa13106327dc9893bea4b8d9cc93a80a16 SHA-256: ea9f66f9fd450d1524f701c829f8a440126f06868e0b221bdbf0b8975c893bba
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=arifureta+light+novel+volume+8+pdf In PDF document text
    • https://digafixi.weebly.com/uploads/1/3/0/7/130776371/2201721.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/5d6f2da.pdfIn PDF document text
    • https://wovasemuzusalej.weebly.com/uploads/1/3/1/6/131636629/giradadiniw.pdfIn PDF document text
    • https://pevugubak.weebly.com/uploads/1/3/2/7/132740457/50558761b172021.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367921/normal_5f875afbe9dd4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366398/normal_5f87b6cbefc4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366043/normal_5f87f0936b511.pdfIn PDF document text
    • https://suzokixuvajix.weebly.com/uploads/1/3/0/7/130776208/vesiganabiput-pederux.pdfIn PDF document text
    • https://zelapagetuwuj.weebly.com/uploads/1/3/1/4/131406140/7573714.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/zakeme.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366042/normal_5f8a5d4c496a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367680/normal_5f8755ed440d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365546/normal_5f8752f77fc8c.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/a56ea2a0-42cd-4194-8264-36b6a799d9c0/36918180964.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d40d0bf3-2edf-47df-b50c-f798e5d9a9ba/66009775628.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/673aa903-cf9f-46c1-a340-7bcd209865ea/pebuzajapotetofefopunire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51d9362f-2556-4cd4-a327-54bd4cb9c4c7/43090429823.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f733ca69-dfa3-4b6c-a595-e5dd7a0694a1/vofeboxatugewobiro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43c733dc-2108-43af-be5f-1d8af482b72b/60070158130.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de0a49f0-5432-4873-8576-1f903dec14e5/nusogatovipumuwogino.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bad1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAD1 6372 bytes
SHA-256: 20eb2cbe9fea0ceb88fe331353531d3cd4049af188afdba6dd94ae2c11347f6b
font_01_sfnt_off0000d0b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0B8 5520 bytes
SHA-256: ca1126ae554f3bf0397f805d006dbce7623b65bc93bc40e324812bf828203d04
font_02_sfnt_off0000e351.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE351 10508 bytes
SHA-256: 89a26ad914ffa431659a5558a42aba9b1e5af8ffb8e5aaa893f90f7ecfb89317

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