Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2e4cc1d39f29be1…

MALICIOUS

PDF

45.8 KB Created: 2020-10-04 08:36:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: ff2ab3f99d4244dc5a12d515e9587f1b SHA-1: 5a6457cd84ec6d630ae574e5fa4a6a5f816da804 SHA-256: c2e4cc1d39f29be1bb9cfaa399eae96cc750bdfe4b7228c9837424239a405472
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://gettraff.ru/strik?keyword=aashto+lrfd+bridge+design+specifications+2020+pdf In PDF document text
    • http://files.everlandfarm.com/uploads/1/3/0/8/130874457/7731315.pdfIn PDF document text
    • http://jikude.biesebroek.eu/uploads/1/3/1/8/131856072/fozibegidubewojenov.pdfIn PDF document text
    • http://pigiziku.triviavoices.com/uploads/1/3/1/3/131381806/6276403.pdfIn PDF document text
    • http://zuseru.heartoftucsonart.org/uploads/1/3/0/7/130739344/e781fddac9.pdfIn PDF document text
    • http://kejifade.paintthetownerichmond.com/uploads/1/3/1/3/131383482/d6f3b46f122.pdfIn PDF document text
    • http://files.witeaze.com/uploads/1/3/1/3/131398197/xefanuvejiguzus.pdfIn PDF document text
    • http://lodesa.northsidebandsnc.org/uploads/1/3/1/0/131070306/3976648.pdfIn PDF document text
    • http://files.lookwellblog.com/uploads/1/3/1/6/131606006/nipemo.pdfIn PDF document text
    • http://viwad.mrobinsonmusic.com/uploads/1/3/1/4/131483067/sefakinenebemitajov.pdfIn PDF document text
    • http://files.casadegrode.com/uploads/1/3/0/7/130740490/1599073.pdfIn PDF document text
    • http://files.clarecounty.net/uploads/1/3/2/6/132683000/8588026.pdfIn PDF document text
    • http://files.myvaniscoolerthanme.com/uploads/1/3/1/4/131483265/zefomefewomojuve.pdfIn PDF document text
    • http://nilufo.subcorentals.com/uploads/1/3/1/0/131071290/vagekedas-nesugove-junezakega-fipuwob.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C38 5608 bytes
SHA-256: 33bf2641e92f7b5f70a664609606a945758a406ac4355f8f43221302ad765677
font_01_sfnt_off00006f34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F34 1912 bytes
SHA-256: 5ffeb62cc735427a844e4fc30fe3f408afa3be4b10dd737b69049c1a099b5cd9
font_02_sfnt_off00007861.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7861 10272 bytes
SHA-256: 404bb57ea25b06c54f656fa64765edd1fe38671e614a7e1e00b2307ef0aeff96
font_03_sfnt_off00009b8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B8E 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2