Malicious PDF — malware analysis report

Static analysis result for SHA-256 a45a25b253bf1946…

MALICIOUS

PDF

41.5 KB Created: 2020-10-07 19:01:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: a278b6ed30efc53cdab9e5bf24730d2e SHA-1: 74791fabe9eb5f60905fe25b91fa473bb94192ff SHA-256: a45a25b253bf19468a7a3cddc913cd5eba7aec0c1246dc2d36bca9b1922c5ecb
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=arabic+alphabet+tracing+worksheets+printable In PDF document text
    • http://gizarigij.runtheracedaily.com/uploads/1/3/2/6/132681670/3008744.pdfIn PDF document text
    • http://nojif.amandakedaigle.com/uploads/1/3/2/6/132695663/26faf87d9.pdfIn PDF document text
    • https://site-1037055.mozfiles.com/files/1037055/siparazanupaku.pdfIn PDF document text
    • https://site-1037884.mozfiles.com/files/1037884/pizuv.pdfIn PDF document text
    • https://site-1036960.mozfiles.com/files/1036960/perinov.pdfIn PDF document text
    • https://site-1043885.mozfiles.com/files/1043885/buzoderowuse.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1751/7725/files/vomadijerizufefevowolat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2033/7831/files/dragon_ball_legends_best_extreme_characters.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6069/0589/files/transport_processes_and_separation_process_principles_5th_edition_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0087/5173/files/56636216387.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bcf5731-c04f-415d-a211-ead74f25a418/mikolidododuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01a714fd-7af9-4ae8-983c-1d788996c9db/77602128876.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

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006371.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6371 5480 bytes
SHA-256: 211b2a5e90248615640ec1aed4126c8d535f2f078d9b1999c1b24ec835748154
font_01_sfnt_off00007618.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7618 10128 bytes
SHA-256: 357733607ee4cd89d9da786e450ecf89709e4e6f66c05eea53c5817a776c9008

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