Malicious PDF — malware analysis report

Static analysis result for SHA-256 b171ac64935864ea…

MALICIOUS

PDF

41.8 KB Created: 2020-10-15 23:54:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 6f62ee4946c370f8a2f4f3f58096a285 SHA-1: 682c27bb622c0ce3fcded28191ab7334cb964b8c SHA-256: b171ac64935864eac0cfb6044ccd69e1a693affa1ea07ffe9f97f55ea8b8aba1
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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=english+practice+test+for+bank+exams+pdf In PDF document text
    • https://xojisige.weebly.com/uploads/1/3/1/6/131637148/f6b9193d1f016.pdfIn PDF document text
    • https://kenilajapa.weebly.com/uploads/1/3/1/0/131069910/zekufutute_nuxelatigasinox_rixajonujeba.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/0c18874847f.pdfIn PDF document text
    • https://tunimesepet.weebly.com/uploads/1/3/1/4/131455680/jumibopegixifazoga.pdfIn PDF document text
    • https://mogezisatizate.weebly.com/uploads/1/3/0/7/130775403/3922450.pdfIn PDF document text
    • https://site-1039275.mozfiles.com/files/1039275/19551287800.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366055/normal_5f872f3a6f42b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367633/normal_5f8763734ce35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366360/normal_5f873d9a4b513.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365621/normal_5f87139939585.pdfIn PDF document text
    • https://site-1045392.mozfiles.com/files/1045392/pasuwemoxixexe.pdfIn PDF document text
    • https://site-1043530.mozfiles.com/files/1043530/92795100228.pdfIn PDF document text
    • https://site-1042102.mozfiles.com/files/1042102/polaveno.pdfIn PDF document text
    • https://site-1039607.mozfiles.com/files/1039607/76394304860.pdfIn PDF document text
    • https://site-1036894.mozfiles.com/files/1036894/24443182273.pdfIn PDF document text
    • https://site-1040359.mozfiles.com/files/1040359/lofatobizusidefufib.pdfIn PDF document text
    • https://site-1040984.mozfiles.com/files/1040984/99722884432.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/1416/6949/files/begegaveromiladokusugipu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9100/8418/files/7140579571.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/4784/8602/files/being_alone_quotes_in_malayalam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0468/9975/7218/files/kadupizijedemumi.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_off00006359.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6359 5800 bytes
SHA-256: e830860bec4e2dfa707bec4f4f33089a1d5b1ad8454af421ee8c39fe7480d80e
font_01_sfnt_off000076e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76E4 10220 bytes
SHA-256: 14287fd8a4794dd3e9170ac695ed87f8544b99630cf7c77d4107061f3e22a690

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