Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cf01e90383864f2…

MALICIOUS

PDF

51.4 KB Created: 2020-10-23 06:43:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 00459afb7697a8df8f9d46bac8500291 SHA-1: c5733c7a11c297bec2796b48e11994c597582c5c SHA-256: 3cf01e90383864f22b125fa189d9bbe3a108a53c6a9f0a170877683acbdb6600
192 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ttraff.ru/123?keyword=otc+turbo+pulse+350+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367299/normal_5f8f238f3c581.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369522/normal_5f8ddc13e9ac6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366331/normal_5f87630071a63.pdfIn PDF document text
    • https://vonubaxuted.weebly.com/uploads/1/3/1/4/131452839/5613040.pdfIn PDF document text
    • https://vevejeda.weebly.com/uploads/1/3/0/7/130776099/sutarot.pdfIn PDF document text
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/9678319.pdfIn PDF document text
    • https://junafoxotoroj.weebly.com/uploads/1/3/0/7/130738975/niwudexutisoboruro.pdfIn PDF document text
    • https://gogebuzavoriro.weebly.com/uploads/1/3/2/6/132681212/890c03.pdfIn PDF document text
    • https://xijonezamo.weebly.com/uploads/1/3/1/4/131407630/ebcf03411c1f82c.pdfIn PDF document text
    • https://sesuwulot.weebly.com/uploads/1/3/1/4/131438847/dafujivilisig-jajetux.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/9031774.pdfIn PDF document text
    • https://polabufasol.weebly.com/uploads/1/3/2/8/132814050/saxibafu.pdfIn PDF document text
    • https://pobezewimo.weebly.com/uploads/1/3/2/6/132681951/5c2ffe9740e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/nasm_assembly_tutorialspoint.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/77182036525.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/47759064343.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/zotememodapaw.pdfIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/lozija.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3826/8318/files/curso_de_oratria_e_marketing_pessoal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6035/3429/files/golele.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/1701/3912/files/completing_the_square_corbettmaths_worksheet.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F40 5676 bytes
SHA-256: 8329bb8bc273da48108708dab73b38ea8232039df13e5c54c00910958efde758
font_01_sfnt_off00008277.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8277 11820 bytes
SHA-256: a3ba52d548ef03ff885ccdbeec898483492bc762713a622b9308542b07465e95
font_02_sfnt_off0000aaca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAACA 16092 bytes
SHA-256: ea75db71c9df7250347a03039f742fcd189f5fc3f08964e696816fa8b5227073

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