Malicious PDF — malware analysis report

Static analysis result for SHA-256 510cfa21f86332b8…

MALICIOUS

PDF

45.3 KB Created: 2020-11-07 12:06:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: c5526a2c3903e958a36e5a93fc140c90 SHA-1: e5e8c2c65d1074431331d83839444d493bdf7747 SHA-256: 510cfa21f86332b8244b87402daf3e56a21e6690a02a0e33d16ea69013ce4540
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://traffking.ru/123?keyword=harry+potter+bittorrent In PDF document text
    • https://cdn-cms.f-static.net/uploads/4394082/normal_5fa111f9d290e.pdfIn PDF document text
    • https://dozasasakebo.weebly.com/uploads/1/3/1/1/131164234/1515904.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392871/normal_5f90e9eac8075.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/4d620156-7007-4a4c-9348-d9c66fd25aa5/5741881686.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bf60bfc-a7a6-425d-a187-bec25991b592/taposizalaridomixuzanu.pdfIn PDF document text
    • https://manetomimexa.files.wordpress.com/2020/11/lugotorizereziwatogukomak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73b7557b-0834-4534-9964-c8d1d1813c96/the_crew_best_circuit_car.pdfIn PDF document text
    • https://bugowapowufe.files.wordpress.com/2020/11/palifoxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8cddcd0-2e32-4723-9f2c-4f1f5c432db4/gokerepa.pdfIn PDF document text
    • https://zubonep.files.wordpress.com/2020/11/51759176416.pdfIn PDF document text
    • https://pupirod.files.wordpress.com/2020/11/nozemapopumetuve.pdfIn PDF document text
    • https://sapifotad.files.wordpress.com/2020/11/56626259043.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec760670-169b-4037-a86c-9aeacb40524b/rifarixekujikosojepuj.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_off00007234.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7234 4804 bytes
SHA-256: 8621f6d0b5fa51512cdbbd500d618ca9da37667efe98fc6219476758c878caec
font_01_sfnt_off0000829d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x829D 11300 bytes
SHA-256: d4dd7e247fefc34e67489b94f94671945329288d6f9dae1530dce5151a9a21d5

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