Malicious PDF — malware analysis report

Static analysis result for SHA-256 95b28c0d4e165c76…

MALICIOUS

PDF

45.1 KB Created: 2020-09-30 19:34:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 5e8d0afe72567f339c60fc30e992414b SHA-1: d51b4ad5c56d61568d22d834fa3e77a831be8064 SHA-256: 95b28c0d4e165c76eaa4c470455fc850e4412e0ce7a33479b2a91e7ef975fd10
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=cub+scout+tiger+den+leader+guide+pdf In PDF document text
    • http://files.utahvalleymagicacademy.com/uploads/1/3/1/0/131070604/159573.pdfIn PDF document text
    • http://files.catchingupwithcasey.com/uploads/1/3/1/4/131438501/254269b.pdfIn PDF document text
    • http://files.bonejourdoggiebandb.com/uploads/1/3/1/8/131856232/2911487.pdfIn PDF document text
    • http://files.cameraygal.com/uploads/1/3/1/4/131454098/jurotiwe.pdfIn PDF document text
    • https://site-1037019.mozfiles.com/files/1037019/vigirifa.pdfIn PDF document text
    • https://site-1036894.mozfiles.com/files/1036894/64065200153.pdfIn PDF document text
    • https://site-1037156.mozfiles.com/files/1037156/gopulefusuvufafof.pdfIn PDF document text
    • https://site-1037091.mozfiles.com/files/1037091/4276398617.pdfIn PDF document text
    • https://site-1037120.mozfiles.com/files/1037120/xurisekawonisoxesa.pdfIn PDF document text
    • https://site-1038867.mozfiles.com/files/1038867/paxurobonagokaviges.pdfIn PDF document text
    • https://site-1037069.mozfiles.com/files/1037069/23226043640.pdfIn PDF document text
    • https://site-1037022.mozfiles.com/files/1037022/vavodakuwojoboj.pdfIn PDF document text
    • https://site-1036957.mozfiles.com/files/1036957/4466379266.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/170e947e-43e9-4cd4-9c20-d84188b8cb81/44757732893.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e36c536-d7a6-4643-971d-bdaa67838e11/luritow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f727f262-ca3b-4c40-92a0-9b470813ac27/togafitufa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f610112d-5661-41da-9da3-6c17bbaa4837/xapedavok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da3b461a-b5a0-4ab2-88de-cae3ec615297/51417992385.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_off00006244.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6244 5368 bytes
SHA-256: 53d375d423b70d6e3206f771af72d20fe549e232e563dc54c489a2a90bba119c
font_01_sfnt_off00007488.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7488 11248 bytes
SHA-256: 92e6e63b3d4b332f08897f95c384788ec2febcd723e9ce996eeca29e385ea44d
font_02_sfnt_off00009906.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9906 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3