Malicious PDF — malware analysis report

Static analysis result for SHA-256 247362027d88f9bd…

MALICIOUS

PDF

35.8 KB Created: 2020-10-04 23:11:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 7f95f0619caf669a3535f79a8fb83bf2 SHA-1: 6fcb7b1e1da5debe30c4649dc9dc77bda38ff1aa SHA-256: 247362027d88f9bda0a13ce8d8a2e73943d7417d41c091cc4342691f5132fe2d
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=autodesk+cfd+2020+tutorial+pdf In PDF document text
    • https://site-1040218.mozfiles.com/files/1040218/metameputelu.pdfIn PDF document text
    • https://site-1037251.mozfiles.com/files/1037251/ritixeloniwem.pdfIn PDF document text
    • https://site-1038586.mozfiles.com/files/1038586/46330738333.pdfIn PDF document text
    • https://site-1039896.mozfiles.com/files/1039896/vebobemokaxafifesiware.pdfIn PDF document text
    • https://site-1038592.mozfiles.com/files/1038592/86028948052.pdfIn PDF document text
    • https://site-1037907.mozfiles.com/files/1037907/31675793490.pdfIn PDF document text
    • https://site-1043959.mozfiles.com/files/1043959/31984451017.pdfIn PDF document text
    • https://site-1039833.mozfiles.com/files/1039833/36475719501.pdfIn PDF document text
    • http://tunifovun.hdlive.shop/uploads/1/3/0/9/130969600/bobajape-ribugile.pdfIn PDF document text
    • http://files.knox-graceec.org/uploads/1/3/1/4/131406781/vukeru-nulifu.pdfIn PDF document text
    • http://files.shorelinesolutions.ca/uploads/1/3/0/7/130776483/b6cb605a927.pdfIn PDF document text
    • http://damefurab.200bales.com/uploads/1/3/1/1/131163981/9021530.pdfIn PDF document text
    • http://files.mhjcmerch.com/uploads/1/3/1/8/131857315/554291.pdfIn PDF document text
    • https://site-1040400.mozfiles.com/files/1040400/puravedi.pdfIn PDF document text
    • https://site-1040036.mozfiles.com/files/1040036/44382705790.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_off00004e99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E99 5476 bytes
SHA-256: aa9e37ad1cecc5251b2f0f902fb1a5fe946507fce01afcb9033e6aabacfb90b4
font_01_sfnt_off00006150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6150 9744 bytes
SHA-256: 88ede2c4c6964ce504b533d97f48527a3cc19bf75773bfb7bfce54197e708e65