Malicious PDF — malware analysis report

Static analysis result for SHA-256 f14c409e5ef1c805…

MALICIOUS

PDF

38.7 KB Created: 2020-10-11 21:13:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 86c81dd5de3f13b7d8d803f954816cb1 SHA-1: 73e99f47c6a6894e3cecf07caa6baaeec58a1ce8 SHA-256: f14c409e5ef1c80537a4ce79df8680d222a7730c48f0ede559a55f9db6ab25b1
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/pify?keyword=continuous+time+convolution+solved+examples In PDF document text
    • http://madaz.sankofatuzinde.com/uploads/1/3/1/1/131163729/8fdaf309d0aea4e.pdfIn PDF document text
    • http://files.my-mediamatters.tech/uploads/1/3/1/3/131398547/2800a404.pdfIn PDF document text
    • https://site-1036977.mozfiles.com/files/1036977/nepefelije.pdfIn PDF document text
    • https://site-1038558.mozfiles.com/files/1038558/debadeduwo.pdfIn PDF document text
    • https://site-1043291.mozfiles.com/files/1043291/54940052358.pdfIn PDF document text
    • https://site-1043353.mozfiles.com/files/1043353/61463362867.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/bb7f8241-7b57-4d10-96e1-6693049187a3/nupifas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b8ac858-fd60-45f3-9745-fbf5453b9d65/94462232893.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a737e2c-cf01-4f83-a0b2-5aadcf1c3f15/zexebigutudamolaneburijof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6d53ede-d426-4a6b-b6fe-3ed97c7f8792/81270458730.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/1219/8047/files/madness_retaliation_2_unblocked.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/1852/1242/files/wa-2608_tv_antenna_installation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/2240/3742/files/ryobi_3_8_impact_ratchet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/6761/5648/files/rock_star_nails_ocean_nj.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_off0000587c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x587C 5156 bytes
SHA-256: 06d7db7a3001482c9bf18330dc6cd57f8a081481dd8a998011cab9d22f09db54
font_01_sfnt_off000069f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69F8 10552 bytes
SHA-256: 0f88e6f76e22375b42434f873f355f997e6b5d1a1f5f16a2d587a033527111fc

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