Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5a57fe63f0244ca…

MALICIOUS

PDF

67.3 KB Created: 2021-03-06 12:07:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 6bb1f3383ec259fbe1d028b8c771ac6f SHA-1: 00739dd3fbf9bf75a441c50fe07e2e5bb5673908 SHA-256: f5a57fe63f0244ca0edae6bd1df622bb95a572b82a9babab420591a3f65e76b0
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuzutuzo.ru/award?keyword=honeywell+hyf290e4+quietset+tower+fan+ultra+quiet+powerful+with+remote+control PDF link annotation
    • http://nigoguno.scienceontheweb.net/what_are_descriptive_words_that_start_with_o_to_describe_someone.pdfIn PDF document text
    • https://nametipij.weebly.com/uploads/1/3/1/1/131164318/fuxoxavabataririwi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407303/normal_5fffbd9029d2c.pdfIn PDF document text
    • https://pesosadat.weebly.com/uploads/1/3/4/8/134885101/rujajadadujafuledeja.pdfIn PDF document text
    • http://tadugebakonuged.getenjoyment.net/how_to_edit_text_in_using_paint.pdfIn PDF document text
    • https://pafajawu.weebly.com/uploads/1/3/2/6/132682051/f4699d.pdfIn PDF document text
    • http://vivekawiga.sportsontheweb.net/kirekafelemibewefesijiri.pdfIn PDF document text
    • http://lojapidabud.mypressonline.com/94088885298.pdfIn PDF document text
    • http://zozavelomidabi.scienceontheweb.net/zuxapixivek.pdfIn PDF document text
    • https://kuxokovu.weebly.com/uploads/1/3/0/7/130738635/5852f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384832/normal_5fd1bc04e6038.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4e033dd-fb15-481d-813b-1e7b5b6b80f5/80261683033.pdfIn PDF document text
    • http://disoluje.myartsonline.com/94917807126.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f899cd17-d76c-46a7-bcf9-972607335bf9/trigonometry_formulas_table_properties_and_how_to_solve_questions.pdfIn PDF document text
    • https://587b455d-cc79-4428-8e80-a8b75ce23bca.filesusr.com/ugd/021ec8_0f47812f0e364c33b06a535f664e6edb.pdf?index=trueIn PDF document text
    • https://883cd1dc-02d0-4059-8fa2-99201f92b631.filesusr.com/ugd/6166c9_50c061621b66410997a2b792cfc6a2e0.pdf?index=trueIn PDF document text
    • http://jotudokizer.onlinewebshop.net/how_to_get_iphone_11_user_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f300962a-65f3-4700-b439-b94297027e46/xupevejakiwataketewenape.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_off0000c6b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6B3 6056 bytes
SHA-256: 3511942c5404d015bf2fc0f0e1b4325b0c59d3195c148323826c2f5ece28d786
font_01_sfnt_off0000db44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB44 10472 bytes
SHA-256: 0700b0be4ec5232b2a44461527ec53851e531091d34ab9a4d0cbbc623c71e32e