Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cf03de599893dc0…

MALICIOUS

PDF

39.6 KB Created: 2020-10-11 05:17:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: cb97579de4d592ebc90161e17e3b78c0 SHA-1: 61929b77260eaf3448913e05a4c96f076c41edfa SHA-256: 4cf03de599893dc070cbc4ab5808072c4df56d24a104439e5c3d0c040411870a
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=pioneer+car+audio+manuals+set+clock In PDF document text
    • http://tufotufin.thecrossingsgahanna.org/uploads/1/3/0/8/130874493/nutigoveg.pdfIn PDF document text
    • http://files.santacruztrackclub.com/uploads/1/3/1/6/131637177/9c48df3b6816a3c.pdfIn PDF document text
    • http://tavobujip.estatecomputers.net/uploads/1/3/1/3/131398443/rugefifapakemi-xivajelaso.pdfIn PDF document text
    • http://files.kathrynchristianmusic.com/uploads/1/3/1/4/131437457/6872130.pdfIn PDF document text
    • http://tizewel.rebieramoso.net/uploads/1/3/1/3/131380183/c42ff94.pdfIn PDF document text
    • http://xagosux.mademoisellelinda.com/uploads/1/3/1/4/131453247/megexunonobagi.pdfIn PDF document text
    • https://site-1042287.mozfiles.com/files/1042287/38328599044.pdfIn PDF document text
    • https://site-1039278.mozfiles.com/files/1039278/romemilopefamikuwagewig.pdfIn PDF document text
    • https://site-1038753.mozfiles.com/files/1038753/mobimonadori.pdfIn PDF document text
    • https://site-1037843.mozfiles.com/files/1037843/77248260935.pdfIn PDF document text
    • https://site-1037228.mozfiles.com/files/1037228/wifalatowud.pdfIn PDF document text
    • https://site-1037079.mozfiles.com/files/1037079/falekulobenesaf.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_off00005e26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E26 5152 bytes
SHA-256: 40d0115ac8c28d116c4ba59097f8c7908c4426f6379932decff59ea2e1d10310
font_01_sfnt_off00006f89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F89 10020 bytes
SHA-256: 007b6560bdf1786e61d27bc8be178a17206720ad78f9e802f937eba2b74da96a