Malicious PDF — malware analysis report

Static analysis result for SHA-256 d763152abc7c9944…

MALICIOUS

PDF

43.6 KB Created: 2020-10-07 10:08:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: e796b782b296be3a49e3d131a005da6c SHA-1: ecf0d237f1944a586aa6723ff7a9e329dd2570c8 SHA-256: d763152abc7c994413c36c02144458bdedd2b78d0082485c1c73994506730a08
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=sr%2528+oh%2529+2+soluble+or+insoluble In PDF document text
    • https://site-1041846.mozfiles.com/files/1041846/1899991576.pdfIn PDF document text
    • https://site-1039496.mozfiles.com/files/1039496/67043122451.pdfIn PDF document text
    • https://site-1037028.mozfiles.com/files/1037028/judazeratatezem.pdfIn PDF document text
    • https://site-1038378.mozfiles.com/files/1038378/diwipavikojitubadifut.pdfIn PDF document text
    • http://files.floridapackages.ca/uploads/1/3/2/6/132680813/9786419.pdfIn PDF document text
    • http://files.oharts.net/uploads/1/3/0/7/130775242/43bbe548d08d.pdfIn PDF document text
    • https://site-1042927.mozfiles.com/files/1042927/21901419163.pdfIn PDF document text
    • https://site-1036969.mozfiles.com/files/1036969/1437031602.pdfIn PDF document text
    • https://site-1038919.mozfiles.com/files/1038919/2306593121.pdfIn PDF document text
    • https://site-1043403.mozfiles.com/files/1043403/9070809834.pdfIn PDF document text
    • https://site-1037079.mozfiles.com/files/1037079/baguvanajagixugakuboga.pdfIn PDF document text
    • https://site-1037273.mozfiles.com/files/1037273/rufifetetasazafovolexi.pdfIn PDF document text
    • https://site-1036698.mozfiles.com/files/1036698/dekal.pdfIn PDF document text
    • https://site-1040092.mozfiles.com/files/1040092/vupagupubuxelapexidarupop.pdfIn PDF document text
    • https://site-1039217.mozfiles.com/files/1039217/nogovodavot.pdfIn PDF document text
    • https://site-1038890.mozfiles.com/files/1038890/67468109232.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_off00006a74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A74 5092 bytes
SHA-256: c28449268f925b50ed7022ae679664c4b5a08bd55c0ba4337af8dbeb9f9f13b4
font_01_sfnt_off00007bc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BC9 10948 bytes
SHA-256: 01d9e647f3862c2e40b8635f818a0ee3de8557449f7b14acfe9a64fa5c86e7c9