Malicious PDF — malware analysis report

Static analysis result for SHA-256 e08c155b676c434f…

MALICIOUS

PDF

40.5 KB Created: 2020-11-08 17:29:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 4bbb5adeb29d74422c21a37737e7dcc0 SHA-1: ce779fe8e6d8b1840d64730fef98ef575ae3a290 SHA-256: e08c155b676c434fe797ff6bf70fb86227c8176c2841fb0708a80bd6d6c26e54
74 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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
  • 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://trafffi.ru/123?keyword=life+cycle+of+a+chicken+worksheet+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4392218/normal_5f942d8d0a06a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401540/normal_5fa307bd10cef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://wiludilake.files.wordpress.com/2020/11/steelseries_arctis_7_pubg_settings.pdfIn PDF document text
    • https://dulifegu.files.wordpress.com/2020/11/sarepu.pdfIn PDF document text
    • https://nudiverid.files.wordpress.com/2020/11/72222428130.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66543fc8-a897-4eb6-b5fb-fa9c9f5d1c41/pugorerofaranowowugimep.pdfIn PDF document text
    • https://gibugorisutu.files.wordpress.com/2020/11/fuloje.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/deciduous_forest_animals_species.pdfIn PDF document text
    • https://nudewef.files.wordpress.com/2020/11/95158550582.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36500bc7-1458-4dda-a227-cbfd6266941c/zixepu.pdfIn PDF document text
    • https://gifujen.files.wordpress.com/2020/11/les_sept_nouvelles_merveilles_du_monde.pdfIn PDF document text
    • https://liwefibago.files.wordpress.com/2020/11/cisco_ccna_book.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_off00006010.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6010 5168 bytes
SHA-256: eb3fb541e62ddfd043f287102155ddafc2dc45a53d6348f5ebbfc6286420e11a
font_01_sfnt_off000071bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71BD 10424 bytes
SHA-256: 31f27635466b8686f03d630fdf5070f73d9f4e005c38131129cc7ed4faa4db53