Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f715b9ed55c3909…

MALICIOUS

PDF

44.9 KB Created: 2020-10-16 17:25:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: d093388afda55ae5f9752998bcec5dbd SHA-1: f1b2010989b19aca3e41fb1a28590a78fbd13abd SHA-256: 3f715b9ed55c390985d530898d55c4f085d80a50ee7d7ef965f919a0620bacc8
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/123?keyword=central+luzon+map+pdf In PDF document text
    • https://povutepumik.weebly.com/uploads/1/3/2/7/132741486/vetukozone_dakuzovege_konogi_ramikujodok.pdfIn PDF document text
    • https://jewajufigojoxi.weebly.com/uploads/1/3/1/4/131438211/zekaxowotagetajud.pdfIn PDF document text
    • https://fotejisatowonu.weebly.com/uploads/1/3/2/3/132302873/05f7e70129.pdfIn PDF document text
    • https://vodiwisilob.weebly.com/uploads/1/3/2/6/132681054/d4bfde9d3f9444.pdfIn PDF document text
    • https://remewizefo.weebly.com/uploads/1/3/1/8/131856163/949122361a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374360/normal_5f88f03ca7b4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369663/normal_5f87f8c48aaed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368985/normal_5f88f1e5d0158.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365540/normal_5f872c9173c4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370087/normal_5f899b177a474.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365536/normal_5f88f9b420064.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368495/normal_5f881a9e588b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368218/normal_5f87de55054d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374843/normal_5f8908f3ce88d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365652/normal_5f8704b5ebb7b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367650/normal_5f890d2460787.pdfIn PDF document text
    • https://vimiwegom.weebly.com/uploads/1/3/0/7/130775837/3302978.pdfIn PDF document text
    • https://naxizugopigonav.weebly.com/uploads/1/3/1/4/131408516/4942006.pdfIn PDF document text
    • https://nakumupapetiz.weebly.com/uploads/1/3/2/7/132741615/4873dc2d65f15.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/8309ec54-44bb-4bd6-bfd1-49a1c35d70e7/dowozovelabowukonabi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/796db6ca-b22a-42a6-9194-34d74cc7eb2c/58302168985.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04367a0b-12f9-4176-82d7-d2008467fcd2/30031308208.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_off00006a4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A4D 4964 bytes
SHA-256: 5ac49ecd3a9adcde1874db29a0adfd470a57c4cce2757a46e905f657628137f5
font_01_sfnt_off00007b20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B20 13416 bytes
SHA-256: 8c99fcbdf1efa8703960eab223ee7d063808d1d7af6daf1dfc1183b635ae18c3

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