Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e6a5d90adaea708…

MALICIOUS

PDF

56.1 KB Created: 2020-10-15 13:29:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 6798ea84935186b18af6a2b9e0ebffad SHA-1: 5267fd149aa37e166fe91bd3bde10b65edbb85bb SHA-256: 4e6a5d90adaea7082f754bba97127385dc3072c8410d12659601ed58da7b30f0
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://ggtraff.ru/123?keyword=livedata+android+example+androidhive In PDF document text
    • https://site-1038703.mozfiles.com/files/1038703/82593758436.pdfIn PDF document text
    • https://site-1037061.mozfiles.com/files/1037061/bimigetom.pdfIn PDF document text
    • https://site-1043477.mozfiles.com/files/1043477/58970289758.pdfIn PDF document text
    • https://site-1040263.mozfiles.com/files/1040263/wunokajikejujinakate.pdfIn PDF document text
    • https://site-1042604.mozfiles.com/files/1042604/11663106874.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366306/normal_5f87199501de1.pdfIn PDF document text
    • https://site-1038592.mozfiles.com/files/1038592/52865087327.pdfIn PDF document text
    • https://site-1037858.mozfiles.com/files/1037858/26365833601.pdfIn PDF document text
    • https://site-1040521.mozfiles.com/files/1040521/88117198191.pdfIn PDF document text
    • https://site-1036772.mozfiles.com/files/1036772/80407044861.pdfIn PDF document text
    • https://site-1036938.mozfiles.com/files/1036938/xosixodolegusoj.pdfIn PDF document text
    • https://site-1042604.mozfiles.com/files/1042604/44417122994.pdfIn PDF document text
    • https://site-1036924.mozfiles.com/files/1036924/rafipawefowabezomo.pdfIn PDF document text
    • https://gazesomudari.weebly.com/uploads/1/3/1/0/131070071/ramupira.pdfIn PDF document text
    • https://jobubati.weebly.com/uploads/1/3/1/4/131453688/3770832.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/a5d7a557-4e00-4901-a7f2-10e2e16a47f2/vapidimorezuzidogif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc128891-9506-461b-ad2a-8366008c0aa4/bekekezolizovawaju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba1eb7af-7baf-4a3d-8921-2200b4a4e98e/bobitomajezagope.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/988e1494-1a4b-4c1c-916c-6f84fa27567e/saxajalemafifedo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008804.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8804 5088 bytes
SHA-256: f5cbb0ceb473972f90c8f15763baab620b330eedb2c6c4361f4545244989b2ac
font_01_sfnt_off0000992a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x992A 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off0000a1b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA1B8 15480 bytes
SHA-256: 59c413eb0f2bc20a7cf775fbafdc0115a1c8c9bf718613cdada9050ff88e3fa8