Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e9cd2f26addae28…

MALICIOUS

PDF

71.7 KB Created: 2020-10-02 22:23:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 94b51e968d7059272da37a53b0725952 SHA-1: e80d7282c8a6cb8496d74c0c30c580c2a951341b SHA-256: 5e9cd2f26addae286e614e085ebe9ddbefe4149c60726e2f7554d3e33cfcee71
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=libro+de+fisica+2+de+secundaria+santillana In PDF document text
    • http://faxesam.smuphideltatheta.com/uploads/1/3/0/7/130775209/3607718.pdfIn PDF document text
    • http://files.pitchervillesoap.com/uploads/1/3/0/8/130873718/deb4bb6e.pdfIn PDF document text
    • http://files.becomemorecompelling.com/uploads/1/3/0/7/130775505/sufejibovazopu.pdfIn PDF document text
    • http://mavofoka.runne-rite.com/uploads/1/3/1/1/131163664/6eea3eea75.pdfIn PDF document text
    • http://files.heartlandfeeding.com/uploads/1/3/2/6/132681294/140417cf.pdfIn PDF document text
    • https://site-1037215.mozfiles.com/files/1037215/xudog.pdfIn PDF document text
    • https://site-1036743.mozfiles.com/files/1036743/daxizularokixululiri.pdfIn PDF document text
    • http://files.the-vintage-villa.com/uploads/1/3/1/3/131380889/ruboxolejigep.pdfIn PDF document text
    • http://gozef.aayogaandwellness.com/uploads/1/3/1/4/131454215/f86768f5ace2.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
    • https://uploads.strikinglycdn.com/files/acaf622d-8be6-48a0-8b2f-43dbfdb23d31/tedidozuxezodisi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB02 5112 bytes
SHA-256: f294ab1c262b7b076bceee567ad85801bc943009096dca90f3a22142e4b79466
font_01_sfnt_off0000dc6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC6C 11676 bytes
SHA-256: cdd081f54857e2fe67d46f2e63c7eb248a5b8f133a3078debd298c5d0cf19476
font_02_sfnt_off0001028a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1028A 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3