Malicious PDF — malware analysis report

Static analysis result for SHA-256 0849fb50922939e6…

MALICIOUS

PDF

54.5 KB Created: 2020-10-27 19:55:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 0f1e01402f2837eaf02813c39af4a7cd SHA-1: e63dd4cc2beb55023d149d7e8e207ceb08bcc405 SHA-256: 0849fb50922939e621710287f00063e79cadca68116940b04e086910028f0942
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=round+robin+brainstorming+examples In PDF document text
    • https://cdn-cms.f-static.net/uploads/4387031/normal_5f8e2dd06a9d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366015/normal_5f8a30de984c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375361/normal_5f8e7a0d01e01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387590/normal_5f910fab75837.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/5401885.pdfIn PDF document text
    • https://pabeliribid.weebly.com/uploads/1/3/4/3/134384766/dupotimifafafagagawe.pdfIn PDF document text
    • https://denasigetul.weebly.com/uploads/1/3/4/3/134332190/fufaxur-wisokifujuxu.pdfIn PDF document text
    • https://sibakixode.weebly.com/uploads/1/3/2/8/132814768/fawinikaraba.pdfIn PDF document text
    • https://xutewosabog.weebly.com/uploads/1/3/2/3/132303209/perafudelepike.pdfIn PDF document text
    • https://xipunozelizu.weebly.com/uploads/1/3/1/3/131382486/lunibafoxokit-jukokopipum.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/df8d757c-373f-4e56-a091-7da7770d604d/88764713605.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f390165-7377-453e-b8fe-a4cb1ff54881/28322996047.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83c1f4f5-5b7c-4a91-9785-c412b9497ec6/rumupotoripefemigetepe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f31e51e6-f641-4ae1-bc14-d89fcf788e00/nebirepuluguxogukimepa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bf47081-5234-45ed-8d94-8456f8e59397/hedge_funds_for_dummies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b7f990d-e71f-41c2-973f-d7dc5faa5e7b/40325799509.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/890cf48d-91f6-403a-a555-eac615e8d973/sozanewazunajobazofub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e05dd110-7d40-4780-8e56-740d4b21f1d6/12361321497.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/feba898f-ec3a-4d5f-b782-f095727ded64/12132076061.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_off000089ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89AB 5376 bytes
SHA-256: fe981aa283e5a5729f76a3af9951b541c6e16c3b2769adbfa3da7e821963003d
font_01_sfnt_off00009bd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BD6 10028 bytes
SHA-256: 98e76c91b1093cfe09bb2f489c886690d5e4a76456a894a184b6340f54399c49
font_02_sfnt_off0000be1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE1F 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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