Malicious PDF — malware analysis report

Static analysis result for SHA-256 988b47a67ee05599…

MALICIOUS

PDF

41.1 KB Created: 2020-10-12 13:05:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: cf84552ef2d6ca37a32841e60a4a8414 SHA-1: 29667d3cd87f26d745795afe5fdc125567b55b05 SHA-256: 988b47a67ee0559990897cab4d0a213beb2ec83660899bcf89d5bb64737d5721
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/pify?keyword=assassin%2527s+creed+identity+apk+and+obb+download In PDF document text
    • http://files.englishhillbooks.studio/uploads/1/3/1/4/131437322/8989898.pdfIn PDF document text
    • http://riduzut.episcopalchurchmediator.com/uploads/1/3/1/4/131438405/d44a9.pdfIn PDF document text
    • http://files.sidewalkservantsphilly.com/uploads/1/3/0/9/130969588/309068e.pdfIn PDF document text
    • http://files.texasaikidonetwork.com/uploads/1/3/1/4/131453214/modimupuw-pinusotose.pdfIn PDF document text
    • http://didijeni.alhs18011.org/uploads/1/3/2/6/132681910/9997204.pdfIn PDF document text
    • https://site-1048447.mozfiles.com/files/1048447/zorekasularuronujedi.pdfIn PDF document text
    • https://site-1038343.mozfiles.com/files/1038343/67949054658.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/b74e6b47-e999-465a-9f07-10760c535635/zigosiwemetitikizo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ae6bfcd-06ec-46da-83e9-7db528851b37/25523795946.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc043977-12a9-464c-8e3e-c94b2486667f/kedonojagegox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3055808d-3f0d-4456-8ef2-31d9699835da/61272328991.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f577dbe-fa73-49ac-bcab-673710630344/jonimiralibokixeva.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_off00005fe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FE5 5488 bytes
SHA-256: 74ee9916c4244fa601b4265c54d3b6b3ae1805d3a34de4add0d70e77a23adebe
font_01_sfnt_off000072ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72AD 10976 bytes
SHA-256: d1555cfc68d26aa2671f901d271a68eca48e2d65c4973494f50d93d25ae324c2