Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6c04e396f2f80d9…

MALICIOUS

PDF

54.5 KB Created: 2020-10-28 02:06:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: a79c60b5b6adb4b2524427a49cae832e SHA-1: 5f1a94997d490c36ad7a1dc78a0cfa46cad1f5ba SHA-256: a6c04e396f2f80d9bd27190822b8b1a24fc2f4e2bc1610ba31feba8f23a052ef
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://cctraff.ru/123?keyword=street+fighter+4+apk+rexdl In PDF document text
    • https://zevejekigo.weebly.com/uploads/1/3/4/3/134374512/powibimikadis_wadawevud_boborok.pdfIn PDF document text
    • https://ridolagu.weebly.com/uploads/1/3/0/7/130775195/gojagativite.pdfIn PDF document text
    • https://kemumapuvepuvi.weebly.com/uploads/1/3/4/3/134311950/3757175.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/987b21c6b.pdfIn PDF document text
    • https://folarudivol.weebly.com/uploads/1/3/1/8/131871739/50a77143625eb.pdfIn PDF document text
    • https://vopevejefed.weebly.com/uploads/1/3/1/6/131606133/f8828c.pdfIn PDF document text
    • https://vixijusodu.weebly.com/uploads/1/3/0/7/130776714/nidale-kokopafupoxa-veripinu-duvakipusomes.pdfIn PDF document text
    • https://satobolusiv.weebly.com/uploads/1/3/1/3/131398412/budijox-nurak-renowevob.pdfIn PDF document text
    • https://mabanopovofed.weebly.com/uploads/1/3/1/4/131453130/vobifaz.pdfIn PDF document text
    • https://simejozegedofu.weebly.com/uploads/1/3/4/3/134359486/3079838.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00009282.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00009282.bin)
    • https://uploads.strikinglycdn.com/files/e162af3e-90b6-4f69-a87c-cee27aecb5cd/34739435180.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/772e8133-b277-4feb-809b-4ea256b77132/excel_2016_capstone_project_ex-3_working_with_sales_data.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be40b792-737b-4c31-8e96-f696969fad85/33918199432.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8109/7904/files/uniform_motion_word_problems_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8129/2706/files/99377740712.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/327df1c8-d859-4507-95c4-9c0895fe4940/emerson_smart_jumbo_universal_remote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/119bb6c0-15f2-4d87-a7b5-0bcd488ae52a/suvezi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/038e4017-cd3a-445e-9e03-34ab1d0b6e67/bumavonejov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0190d840-a6f2-40f5-a3c1-b5e9ad4b46d1/20188926949.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/autismo_causas.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/describing_people_s_appearance_in_spanish_worksheets.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 extracted file (font_00_sfnt_off00009282.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009282.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9282 5448 bytes
SHA-256: deea39670aa988936a4dcad6b5795155eee5188e469496b7e801cdf4659464ff
font_01_sfnt_off0000a506.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA506 12120 bytes
SHA-256: a73e8c8a6db7c653b77ba3d01a61ba131334cc90b9525615e4639e045cd41f92