Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9747214073bb411…

MALICIOUS

PDF

37.1 KB Created: 2020-10-01 09:21:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 8bc917938e8b2dc5f851710fbdae3c56 SHA-1: 6cff58a008f211763416f4a9f8047dd58aeafbbd SHA-256: c9747214073bb4116b19a4cfe0110940a6f81cd64f0e68d3557c7df3254a2b58
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://gettraff.ru/strik?keyword=demyers+neurological+examination+7th+edition+pdf In PDF document text
    • https://site-1036828.mozfiles.com/files/1036828/61492038019.pdfIn PDF document text
    • https://site-1036911.mozfiles.com/files/1036911/visinopomenilagen.pdfIn PDF document text
    • https://site-1036873.mozfiles.com/files/1036873/xiniwatoperuzobopebu.pdfIn PDF document text
    • https://site-1039217.mozfiles.com/files/1039217/xikebifemifulivel.pdfIn PDF document text
    • http://files.kilcloonns.org/uploads/1/3/1/4/131453432/mekutasolukubiwemibu.pdfIn PDF document text
    • https://site-1036975.mozfiles.com/files/1036975/dowekojarobufigafetu.pdfIn PDF document text
    • https://site-1037922.mozfiles.com/files/1037922/nexawijus.pdfIn PDF document text
    • https://site-1039777.mozfiles.com/files/1039777/fipojipekasajupu.pdfIn PDF document text
    • https://site-1037035.mozfiles.com/files/1037035/36480347181.pdfIn PDF document text
    • https://site-1036868.mozfiles.com/files/1036868/vokelen.pdfIn PDF document text
    • https://site-1037212.mozfiles.com/files/1037212/lavotalamofilekazizekazu.pdfIn PDF document text
    • https://site-1037145.mozfiles.com/files/1037145/xifuritutoxuxebobipigos.pdfIn PDF document text
    • https://site-1039811.mozfiles.com/files/1039811/naxajuwejorijiwuvoxoko.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00005297.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5297 5820 bytes
SHA-256: 1bcca4391550e09617c7291939fa271a7053a416c5e922d0925d03356426a40d
font_01_sfnt_off00006659.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6659 9664 bytes
SHA-256: 827db91a871c694c0f112acd3d5f5a9e01ab78dc52cb15b88e8df4724883d92b