Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ad4e09d23ffd7ad…

MALICIOUS

PDF

44.5 KB Created: 2020-10-02 02:21:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 2e25c06175406df9fd2485ab0ff2a59d SHA-1: bac611d8d9b024ce699dd8166f5af2dfa0f4c4ec SHA-256: 7ad4e09d23ffd7ade84b6f6d04383e342596b6b9aa97f5a34cb36fd167be423f
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://cctraff.ru/strik?keyword=notas+de+enfermeria+ejemplos In PDF document text
    • https://site-1036958.mozfiles.com/files/1036958/jirixapufem.pdfIn PDF document text
    • https://site-1037266.mozfiles.com/files/1037266/193288020.pdfIn PDF document text
    • https://site-1036791.mozfiles.com/files/1036791/zigukijojurakized.pdfIn PDF document text
    • https://site-1040881.mozfiles.com/files/1040881/widakuduw.pdfIn PDF document text
    • https://site-1041081.mozfiles.com/files/1041081/47250734522.pdfIn PDF document text
    • http://kitel.lushandstyles.com/uploads/1/3/1/1/131164250/5508707.pdfIn PDF document text
    • http://files.calabrianvoice.com/uploads/1/3/0/8/130874254/kovukugupajumag-lixidevolu-zoxapoxilakib.pdfIn PDF document text
    • http://zekubika.haraldwiltsche.com/uploads/1/3/2/7/132740405/dudutuf_xalesodekon_luwilutafiwew_livul.pdfIn PDF document text
    • http://murazoni.weddingplannerburnaby.ca/uploads/1/3/1/1/131163747/094b42.pdfIn PDF document text
    • http://dugotirud.ricklewisrealestate.com/uploads/1/3/2/7/132740482/6455883.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/2cfbc5e9-5a6c-4b6c-b6fb-161310b3037a/27226861068.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/352a4092-694c-47ca-8ee2-90f86667fbea/dunawujadojetefobozi.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_off000060f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60F9 5020 bytes
SHA-256: 5ba1092d4f084c8c7b57de9ed7ef9ed8f241bf521681d0d223d7910c032c11d0
font_01_sfnt_off000071f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71F0 10928 bytes
SHA-256: 7118f41275c6144440d195f3fc3e0af374979753f57b791f3e12dbbcbaa711d7
font_02_sfnt_off0000956e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x956E 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176