Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c699fa7bde9ccb1…

MALICIOUS

PDF

51.2 KB Created: 2020-11-09 10:13:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 311db56737ec52befa5c5633722f8a25 SHA-1: 5cf8daf9815242c153156908834da1c333320f1c SHA-256: 2c699fa7bde9ccb19b72b6b4b2f777184e51ec0e9759c9f1348a75c023c685e8
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/123?keyword=thomas+jefferson+high+school+football+game PDF link annotation
    • https://lebuwaner.weebly.com/uploads/1/3/4/4/134478239/fosoritinotizad_dovukabojax_femikoxu.pdfIn PDF document text
    • https://baminivosawu.weebly.com/uploads/1/3/4/7/134701136/856c148a8f8b.pdfIn PDF document text
    • https://lisiruzefixa.weebly.com/uploads/1/3/4/4/134495270/8105690.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456667/normal_5fa3331a50b08.pdfIn PDF document text
    • https://tololomajaju.weebly.com/uploads/1/3/4/4/134472688/6383219.pdfIn PDF document text
    • https://nusokusin.weebly.com/uploads/1/3/4/3/134350978/dafoki.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://kadurenokadi.files.wordpress.com/2020/11/xuxeg.pdfIn PDF document text
    • https://feluxeb.files.wordpress.com/2020/11/35311836295.pdfIn PDF document text
    • https://wefufepolo.files.wordpress.com/2020/11/en_busca_del_tiempo_perdido_marcel_p.pdfIn PDF document text
    • https://bojuxun.files.wordpress.com/2020/11/walexufitudate.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/jodeteg.pdfIn PDF document text
    • https://vevadiwo.files.wordpress.com/2020/11/70854203510.pdfIn PDF document text
    • https://nevosaxovib.files.wordpress.com/2020/11/fizimobaruweboratiweti.pdfIn PDF document text
    • https://virinumit.files.wordpress.com/2020/11/delta_blues_guitar_tabs.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66D6 5248 bytes
SHA-256: 64a884635ac6dc92788dca09ab2cc38b50aa90b018e3574b4c3a58f8c192a366
font_01_sfnt_off00007885.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7885 10388 bytes
SHA-256: ba29939ff90e3e6f3ab0cde8493a5b94934b9423b588ac185cacf318443439e3
font_02_sfnt_off00009c45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C45 16072 bytes
SHA-256: d8c19fdfeecd64e832dd8c9352b1260cc303b71c54455e55e6a3d621321cf58b
font_03_sfnt_off0000b0ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0EA 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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