Malicious PDF — malware analysis report

Static analysis result for SHA-256 f76b72db1becd81b…

MALICIOUS

PDF

53.1 KB Created: 2020-10-06 23:08:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 60667e05dd5c77db26b7b8c8205e51f7 SHA-1: f4d71649d31cc7fed92bce53fd757aab474ccd91 SHA-256: f76b72db1becd81b5acb48366999f85e94a6afea808bc94170949e7fcb90ef75
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://ttraff.cc/pify?keyword=mandelbulb+3d+voxel+stack+tutorial In PDF document text
    • http://files.kaufmanfieldguides.com/uploads/1/3/0/7/130739328/ecdcf27ca9.pdfIn PDF document text
    • http://xuded.pluckings.com/uploads/1/3/1/8/131856374/29f1a8.pdfIn PDF document text
    • http://wesetogen.ohiocensus.org/uploads/1/3/1/0/131070765/04b009ebe6b79c2.pdfIn PDF document text
    • http://files.rozannaartist.co.uk/uploads/1/3/0/7/130739101/lisezerezaroluxo.pdfIn PDF document text
    • https://site-1040575.mozfiles.com/files/1040575/pokokemokowoba.pdfIn PDF document text
    • https://site-1043408.mozfiles.com/files/1043408/35420272562.pdfIn PDF document text
    • https://site-1040386.mozfiles.com/files/1040386/fubebasirojowewew.pdfIn PDF document text
    • https://site-1036932.mozfiles.com/files/1036932/87330853810.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/3a07afb4-b3cb-4d9a-8681-a594fdef18ef/96979199716.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d90185b-da57-4f5b-8d8a-9d1f592a8910/97708920849.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcabb65b-faa5-4d9a-afe1-7ddac42c6500/tuxanarukonejuwowin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56c0845f-1a3c-4800-9f0d-2aeef20febad/70760119058.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4018768f-408b-4119-9fa4-a65ee886a29b/4667265842.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6897c599-1d34-451e-804b-8df3503c6f25/69361430245.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f77a98d5-4286-421d-8253-98a13fafdd05/tewutapo.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_off0000910e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x910E 5432 bytes
SHA-256: cebf5221f0d2d87f9906047fdf73e79ce6256c142748ab44e9bc7ec10c00acaa
font_01_sfnt_off0000a3ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA3AE 10748 bytes
SHA-256: 791fb2ea2b91324d350aa1ee198c607917166c337b33f47037a4b12739736a63

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