Malicious PDF — malware analysis report

Static analysis result for SHA-256 18881e4f4626e7fe…

MALICIOUS

PDF

43.6 KB Created: 2020-10-04 07:53:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 54c5b2a6d5d2729a8d743c91a1a21747 SHA-1: 7f30a2f6d57d03e976b8278144ca1a2218bf7f8e SHA-256: 18881e4f4626e7fef4a1a21c43b7d8cae7c80a4599dc8b33b69a3db9fa09d6ec
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=non+action+verb+pdf In PDF document text
    • http://files.darkhorsesaddlery.com/uploads/1/3/2/3/132303035/7dd19e.pdfIn PDF document text
    • http://files.amandasunshinewilliams.com/uploads/1/3/0/9/130969357/vuluwafepena.pdfIn PDF document text
    • http://files.alexiswarthen.com/uploads/1/3/2/7/132710687/5fae5dea.pdfIn PDF document text
    • http://files.porterfinancescam.greatwebsitebuilder.com/uploads/1/3/2/6/132695531/1fd3cd901fba.pdfIn PDF document text
    • http://files.refugehomecare.com/uploads/1/3/1/6/131637062/8d68351be2.pdfIn PDF document text
    • https://site-1036840.mozfiles.com/files/1036840/zipuja.pdfIn PDF document text
    • https://site-1036743.mozfiles.com/files/1036743/zazogoligudubokixature.pdfIn PDF document text
    • https://site-1039707.mozfiles.com/files/1039707/mizekexomaxotebos.pdfIn PDF document text
    • https://site-1041210.mozfiles.com/files/1041210/43472243756.pdfIn PDF document text
    • https://site-1036729.mozfiles.com/files/1036729/59163980550.pdfIn PDF document text
    • http://files.allpowernationals.com/uploads/1/3/2/8/132816195/rasuv.pdfIn PDF document text
    • http://files.westendjiujitsu.com/uploads/1/3/1/6/131636689/1082198.pdfIn PDF document text
    • http://nifejinij.wethammockfarm.com/uploads/1/3/1/8/131856177/6270512.pdfIn PDF document text
    • http://fowus.pasifikabusinessnetwork.com/uploads/1/3/0/8/130874161/6f1129b.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/08a111af-82e6-4d5e-848f-d8514c989b54/zorepaguravelaxagisudad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a6b7b35-d7a4-4128-b01a-bb4d76e138dd/47622237932.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e8337d5-271f-4e2d-b04e-5e6122d74fe0/taruzaxaxujofiviluvi.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_off00006d5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D5A 5108 bytes
SHA-256: 1aaf24e0ec6306aa6be1658c3d9249eb4f3d09985971e5b4dd912b4c1f2c23d0
font_01_sfnt_off00007ed3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7ED3 10156 bytes
SHA-256: 724fe1f6dae658eff2f60f4e84a579d7b1c8d661f9a71c3f0903954afb9463d9

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