Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f03f813dddd7f56…

MALICIOUS

PDF

40.1 KB Created: 2020-10-03 09:45:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: cce7db7fe94e539d9a6af0668a8db5cd SHA-1: 676be1b0cf3a97ea65b8c34993edcf3203a97c8e SHA-256: 2f03f813dddd7f562c21646af447d174345bcc8f6dd81ff3c7150debea7e3eed
132 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 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://cctraff.ru/strik?keyword=technics+turntable+sl-23+manual In PDF document text
    • https://site-1036997.mozfiles.com/files/1036997/2806460447.pdfIn PDF document text
    • https://site-1039815.mozfiles.com/files/1039815/nomivaxefizinatok.pdfIn PDF document text
    • https://site-1036692.mozfiles.com/files/1036692/manuse.pdfIn PDF document text
    • http://jeval.milazanenyc.com/uploads/1/3/0/9/130969742/kawalepuwesalav.pdfIn PDF document text
    • http://kijeto.humananatomyandphysiology.org/uploads/1/3/0/8/130874104/c585ee54df.pdfIn PDF document text
    • https://site-1039721.mozfiles.com/files/1039721/70240687037.pdfIn PDF document text
    • https://site-1037843.mozfiles.com/files/1037843/kaxorud.pdfIn PDF document text
    • https://site-1039617.mozfiles.com/files/1039617/redosozopep.pdfIn PDF document text
    • https://site-1037221.mozfiles.com/files/1037221/xinixusuzo.pdfIn PDF document text
    • https://site-1036783.mozfiles.com/files/1036783/bojozo.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/b07a2d0e-4a98-4b08-9c4a-283bb682eca5/zagemo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88b647db-1419-493a-a591-8b03d80047cc/47076220927.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23fa2b22-c092-47c2-beed-d151c4e05f6e/28246224715.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_off000054b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54B2 5456 bytes
SHA-256: ff09ea99f5e5e71764af23030fb4195e07b8e0d209c1d48b771086fe15fb192a
font_01_sfnt_off00006719.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6719 14456 bytes
SHA-256: ac87326c63f141c97634ec1fae3f94d5485046f657dac2b73acf481620cc33f3

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