Malicious PDF — malware analysis report

Static analysis result for SHA-256 b13987b6462cd6ec…

MALICIOUS

PDF

41.6 KB Created: 2020-11-08 23:09:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: b272f77d47916540f2d53780b934c46a SHA-1: 0da377271e7fde8fbadbabcc2091c84eb8c15ea4 SHA-256: b13987b6462cd6ec825d3a575550e575f6a9ccdf1905185c77d4bebd60936358
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/aws?keyword=download+apex+legends+hacks+for+pc PDF link annotation
    • https://zeleruzonupaza.weebly.com/uploads/1/3/4/3/134358533/ninezixusaredofop.pdfIn PDF document text
    • https://bapadiwifujeki.weebly.com/uploads/1/3/4/0/134041393/piruz-nijupunaj.pdfIn PDF document text
    • https://pukejuzim.weebly.com/uploads/1/3/4/4/134457080/fumuxosuvowamonebi.pdfIn PDF document text
    • https://jupoviladuxeru.weebly.com/uploads/1/3/4/3/134310568/2348993.pdfIn PDF document text
    • https://jemajodelevo.weebly.com/uploads/1/3/4/3/134394711/e1accc5fffc26fa.pdfIn PDF document text
    • https://komamopiragi.weebly.com/uploads/1/3/4/4/134444029/8902856.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379618/normal_5f93f405cd387.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413016/normal_5f97cf0e31b6a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://femawew.files.wordpress.com/2020/11/lerunosakowet.pdfIn PDF document text
    • https://tofegunobu.files.wordpress.com/2020/11/60521788662.pdfIn PDF document text
    • https://xafatukakafu.files.wordpress.com/2020/11/zeloxofotubada.pdfIn PDF document text
    • https://juvibix.files.wordpress.com/2020/11/wazasusegupaxusijip.pdfIn PDF document text
    • https://dipadek.files.wordpress.com/2020/11/mehmet_okuyan_kuran_meali.pdfIn PDF document text
    • https://kebupud.files.wordpress.com/2020/11/16674380217.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_off000061fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61FD 5640 bytes
SHA-256: cf8adabf5e86845e04eb4d55c2dc316aea613ac944b32e6e69c7219aab81ed3b
font_01_sfnt_off0000754b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x754B 10780 bytes
SHA-256: 82d88ae7e9e24237d7aa8d1c4ade357439c3e606e07dacbc85aba63658016298