Malicious PDF — malware analysis report

Static analysis result for SHA-256 738b5e40827cef18…

MALICIOUS

PDF

50.6 KB Created: 2020-10-15 17:53:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 8785a9a77600230654e72138f63ca9bd SHA-1: ef8edbf9b39ce583f0ac8b1767c776cbc96244f1 SHA-256: 738b5e40827cef18b5e4efa1a5097355cccf48d4ba3114211901fdf692e6f730
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://ggtraff.ru/123?keyword=plastic+injection+molding+design+guide In PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/zuvefusu_tewojawowebav.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/vepulakanug.pdfIn PDF document text
    • https://xojisige.weebly.com/uploads/1/3/1/6/131637148/5910241.pdfIn PDF document text
    • https://nobinetezo.weebly.com/uploads/1/3/0/9/130969761/1700446.pdfIn PDF document text
    • https://site-1036807.mozfiles.com/files/1036807/73169232941.pdfIn PDF document text
    • https://site-1036685.mozfiles.com/files/1036685/13444051516.pdfIn PDF document text
    • https://site-1044115.mozfiles.com/files/1044115/22654400550.pdfIn PDF document text
    • https://site-1039922.mozfiles.com/files/1039922/kekulelakanufeman.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365624/normal_5f88104e58b5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366376/normal_5f8739d5b3934.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365540/normal_5f873423c82ae.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/faedde3c-d71f-4795-a76c-23f349f33bc8/vudilitajumenexurekof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e77e3c8f-ea0b-493c-b4cc-4153a7dc1aa9/52902313479.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1078ee13-72cc-4d18-8cb3-b2e50aeb5542/banas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/856ff108-3b89-4738-a987-ef27c7c95a6b/80988246186.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68de0c45-2105-4ed2-850d-f9f88f956736/15079068960.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8116e155-c9b7-4c5f-b661-fcc898c7ea0b/dironepogetebeni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c164b434-91c6-452f-9877-11c20659130b/zekolojeledakixafefezega.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17bb6936-7dbc-4e94-841f-b04eb8b22b66/39627309982.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f685370-c16b-4f8a-87bd-bfbb786c0d14/jabakulixux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0291e5a6-9572-4c20-976e-67d5c2b3c24b/13533024070.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_off0000789a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x789A 5120 bytes
SHA-256: 591ca9735f6781b69811b4f50a5e186247bf79a83f0db6d05ed2f836345caeb0
font_01_sfnt_off000089eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89EB 10828 bytes
SHA-256: e26806b06a1b3cbb6c4af996c600de320ac50dcc62c90b6a7de3c4a620ad020e
font_02_sfnt_off0000aee5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEE5 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2