Malicious PDF — malware analysis report

Static analysis result for SHA-256 87eb6638fb5089e5…

MALICIOUS

PDF

66.1 KB Created: 2021-03-10 10:07:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 8dd860c83625cadb2e173270008891b3 SHA-1: 4bfe6fd2bfb0f5f937b9edea8328179f4644c358 SHA-256: 87eb6638fb5089e5ffddd467075b6f864af5051e03e5fb3d608b474e45400d9a
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://pelibifir.ru/wix?keyword=thing+thing+arena+classic+full+screen PDF link annotation
    • https://cdn.sqhk.co/nalomuxe/igjamjc/65525311408.pdfIn PDF document text
    • http://sesesuruko.mypressonline.com/xegatajefiduvuvuwidenen.pdfIn PDF document text
    • https://cdn.sqhk.co/pepupiribojo/gFBjepK/lotugakineruz.pdfIn PDF document text
    • https://cdn.sqhk.co/mekurapiw/dfgjWij/cuba_mo_storage_facilities.pdfIn PDF document text
    • http://creditscoreusa.info/58118261341dl2pd.pdfIn PDF document text
    • https://cdn.sqhk.co/resilano/h3wigoM/xibilizafafimisot.pdfIn PDF document text
    • http://bred-enligne.com/8133306956w611m.pdfIn PDF document text
    • https://cdn.sqhk.co/nomuzali/gfieiiY/friend_search_tool_simulator_random_video_call.pdfIn PDF document text
    • http://ruvinowuge.scienceontheweb.net/nakuwenemewitowezofuv.pdfIn PDF document text
    • http://forajadafogaxuv.medianewsonline.com/comparatif_superlatif_anglais_tableau.pdfIn PDF document text
    • http://xubanapirobula.mypressonline.com/the_poky_little_puppy_golden_book.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7f1d4f38-7308-4051-b389-b8ed31312188.filesusr.com/ugd/e948c1_c679c5529aed4dfdaac4b6b40271e5e5.pdf?index=trueIn PDF document text
    • https://60d3db2d-e502-4566-8930-da862ca7ce06.filesusr.com/ugd/99b222_e8003d5c134a4a96aa9b11cf924d55f6.pdf?index=trueIn PDF document text
    • https://e5eb5b25-b33c-43e3-82d5-57ab1bf863d8.filesusr.com/ugd/b0c717_1a811f1419d346a89a281b90399d27e9.pdf?index=trueIn PDF document text
    • https://f5f74d4f-f804-4d9b-9bfa-9964b2756261.filesusr.com/ugd/e389b3_00b56d4c8151412b9d83b28549717b33.pdf?index=trueIn PDF document text
    • http://tavoxelelenasi.onlinewebshop.net/69732910407.pdfIn PDF document text
    • https://74269c25-1731-4359-90d4-804f54ef9c1c.filesusr.com/ugd/b5973a_f0171aa9db154b5b920b4474ec0e3665.pdf?index=trueIn PDF document text
    • https://528a8416-53f4-4693-bcf0-540471887af1.filesusr.com/ugd/c3aa89_5424317d5bcb4b5aa2d61386a9376606.pdf?index=trueIn 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_off0000c6d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6D6 5092 bytes
SHA-256: b6bbdd5518ac44ded2e9d4baceb30a6e198be9942eec46be371ed15147c5e669
font_01_sfnt_off0000d825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD825 10384 bytes
SHA-256: 023a33d1f7b72cd04651dbf501f4b7379790e13a61f2010218d6c5667bab602c

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