Malicious PDF — malware analysis report

Static analysis result for SHA-256 c92e3af90b439d14…

MALICIOUS

PDF

38.8 KB Created: 2020-10-07 17:44:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: b3d4d37fa9680c8451d9703102e8c96a SHA-1: 85226815961e1eeee57c3b0a650d4fa8474ea0eb SHA-256: c92e3af90b439d147cf54028a0a63c358c624b7e2a69e020e81a9bb760153c59
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=kim+b+foglia+answers In PDF document text
    • http://files.pemaincolorado.com/uploads/1/3/2/8/132814589/wagigekibapi.pdfIn PDF document text
    • http://files.yumaeastcc.com/uploads/1/3/1/3/131398008/mexaj_lipoj_tojasulevu.pdfIn PDF document text
    • http://files.menalivebalm.org/uploads/1/3/0/9/130969198/fuvimopufeweg.pdfIn PDF document text
    • http://files.riversidemassage.net.au/uploads/1/3/2/7/132740693/1873744.pdfIn PDF document text
    • http://kiduz.francophile.blog/uploads/1/3/0/9/130969481/484ea15d3b8b.pdfIn PDF document text
    • https://site-1039544.mozfiles.com/files/1039544/ragupumazer.pdfIn PDF document text
    • https://site-1037828.mozfiles.com/files/1037828/25163006598.pdfIn PDF document text
    • https://site-1040278.mozfiles.com/files/1040278/vojuvavo.pdfIn PDF document text
    • https://site-1038378.mozfiles.com/files/1038378/35191881646.pdfIn PDF document text
    • https://site-1040248.mozfiles.com/files/1040248/xavunomibel.pdfIn PDF document text
    • https://site-1037115.mozfiles.com/files/1037115/dikeriviwilogegazugiz.pdfIn PDF document text
    • https://site-1039789.mozfiles.com/files/1039789/25747037134.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9719/2603/files/twrp_recovery_pro_apk_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/8885/5459/files/patolabasezisa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/6251/7909/files/tuxujilowitojodurivapikip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7189/6736/files/11284094076.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A05 5288 bytes
SHA-256: 8fd5cdc853b729df31819da1c0293f10843fa036545cff731e570fc37885f5b1
font_01_sfnt_off00006c05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C05 10136 bytes
SHA-256: 818860d06666c6261c9c527b748a292055b05f0ee9d15c8b4ed6d1809f9f3e90