Malicious PDF — malware analysis report

Static analysis result for SHA-256 4968b2a172864ae6…

MALICIOUS

PDF

44.5 KB Created: 2020-10-01 14:41:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 98d8f16486730b0a03798f95fc3403f6 SHA-1: e4e6a4eeccfa5d7656133e85bb94c1a9319e370c SHA-256: 4968b2a172864ae66bc6a138aed01ed1bf0d483d3bf489e5274f325c32172902
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/strik?keyword=mario+benedetti+la+tregua+pdf+gratis In PDF document text
    • https://site-1037000.mozfiles.com/files/1037000/86572500919.pdfIn PDF document text
    • https://site-1036938.mozfiles.com/files/1036938/93660454459.pdfIn PDF document text
    • https://site-1037009.mozfiles.com/files/1037009/bosutigutumuvusogewegav.pdfIn PDF document text
    • https://site-1037019.mozfiles.com/files/1037019/vojizewaxer.pdfIn PDF document text
    • https://site-1038555.mozfiles.com/files/1038555/21437972913.pdfIn PDF document text
    • http://files.sawmga.com/uploads/1/3/1/3/131380745/bewazar-soxunerope-fosapulegu-ludimugaxufi.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/0a57fc31-1860-47f8-bd75-341f5c3de330/sujuxodazivenapejogax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39e2f1c0-1b44-425e-942c-b1d1a636edd1/66712713449.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cccb8a56-c488-448f-b977-45c01b9acb99/35248525071.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7331213-3457-409a-860b-6f231c81dcf3/38840656656.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0079/1193/files/revimuwupabikamaruxeku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4161/8082/files/children_s_video_songs_free.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_off00006cde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CDE 5352 bytes
SHA-256: 087ba2dfa20f4916dbdf3798c72b6c4339372bf00930d2a5c617c052bb802a7c
font_01_sfnt_off00007f2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F2B 11932 bytes
SHA-256: 7141c1ffe10519dbf7a79315e46a9f2bd1550a4ff0944ef09ebb2fcbc6ef6d66

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