Malicious PDF — malware analysis report

Static analysis result for SHA-256 18c247aabf69e4d2…

MALICIOUS

PDF

42.0 KB Created: 2020-10-05 08:37:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: a0a14316ba575c11320bc5d8e032e7cb SHA-1: 733375e27105a3479474c559ddd60fb76c71e7ba SHA-256: 18c247aabf69e4d28f66e68e640c5f1cdb71b0ef52299e8da164d03022a3e4da
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=po%25C3%25A9sie+romantique+caract%25C3%25A9ristiques+pdf In PDF document text
    • http://fuvux.arrowsmithchurch.com/uploads/1/3/1/6/131636725/dubovoz-nebowapif-seluleliwug.pdfIn PDF document text
    • http://files.dustinkahoud.com/uploads/1/3/1/4/131406684/ninojer.pdfIn PDF document text
    • http://xalegak.layagsug.com/uploads/1/3/2/6/132695601/1846340.pdfIn PDF document text
    • http://josokom.warrnamboollawntennis.com/uploads/1/3/1/3/131384016/9066252.pdfIn PDF document text
    • http://gifesemus.mohannadgharaibeh.com/uploads/1/3/0/7/130775565/f09d8615c3762.pdfIn PDF document text
    • http://files.jsh401k.com/uploads/1/3/0/8/130814682/c5854f4836418dc.pdfIn PDF document text
    • http://siven.dontworryaboutme.com/uploads/1/3/1/3/131378950/magusesewemido-gaxisuravewur-mukonurar-zoxolikuweriwa.pdfIn PDF document text
    • http://files.redroselandscaping.com/uploads/1/3/1/4/131406592/15bd07861c.pdfIn PDF document text
    • https://site-1036679.mozfiles.com/files/1036679/bikazeveved.pdfIn PDF document text
    • https://site-1036828.mozfiles.com/files/1036828/6079241971.pdfIn PDF document text
    • https://site-1036820.mozfiles.com/files/1036820/90672354017.pdfIn PDF document text
    • https://site-1037000.mozfiles.com/files/1037000/vinodemodari.pdfIn PDF document text
    • https://site-1038397.mozfiles.com/files/1038397/39529184848.pdfIn PDF document text
    • https://site-1040096.mozfiles.com/files/1040096/bixuz.pdfIn PDF document text
    • https://site-1036900.mozfiles.com/files/1036900/65388240063.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_off00006059.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6059 5540 bytes
SHA-256: bb1d03bc5cb778c78ee7fe32a5b43689dd14baca9636eb058f66b7c4c30eaf6d
font_01_sfnt_off000072d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72D1 12300 bytes
SHA-256: 2e6ffcc37150da805e141f4af1d154a4deed59d989ca255f28ce4e6f3cce5f0d