Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc228b4a562c322e…

MALICIOUS

PDF

42.5 KB Created: 2020-10-07 20:18:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 17adde94982de9fd8dedebc91aef8aaf SHA-1: 71069a0b845e590cbee21a1b42d94102addbc1b9 SHA-256: bc228b4a562c322eab734c44ca4ee27594b90806c271b192f02a5853faea0f98
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=hidden+animals+in+face+pictures+with+answers In PDF document text
    • http://rukevuri.bluekoicrafts.com/uploads/1/3/1/8/131856040/zokesobagupisava.pdfIn PDF document text
    • http://wogexex.lthelpinghand.com/uploads/1/3/1/6/131606490/jenepefesetutani.pdfIn PDF document text
    • http://goxonixo.baakboutique.com/uploads/1/3/1/4/131406263/6447010.pdfIn PDF document text
    • https://site-1037900.mozfiles.com/files/1037900/bugaderubifusipupenilokil.pdfIn PDF document text
    • https://site-1048166.mozfiles.com/files/1048166/gavifazipuretuf.pdfIn PDF document text
    • https://site-1037884.mozfiles.com/files/1037884/luliruwugafoz.pdfIn PDF document text
    • https://site-1042940.mozfiles.com/files/1042940/losigirifukutarapokisok.pdfIn PDF document text
    • https://site-1039391.mozfiles.com/files/1039391/58144109516.pdfIn PDF document text
    • https://site-1036824.mozfiles.com/files/1036824/nupisonoj.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/1/0433/7968/7587/files/lee_child_make_me.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/7622/2621/files/mokubokezudusamamiz.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000052b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52B0 5448 bytes
SHA-256: 0692372c9a5510728d615d7da33f010300aa1364343abb8927bc5b7c6bf3dc70
font_01_sfnt_off00006521.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6521 9876 bytes
SHA-256: 9044e7ab7e46ae674a22e693c8fe082246bd8fa643dc1cef97e9922ab4750eec
font_02_sfnt_off00008719.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8719 16376 bytes
SHA-256: 684a3c196e802b4dc45ee85e0d12f41c83d6b6c6a55a83cec5fb8e332ee9aa36