Malicious PDF — malware analysis report

Static analysis result for SHA-256 af85d3f22299d42c…

MALICIOUS

PDF

46.1 KB Created: 2020-11-08 06:04:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: 0dd130b1a0756dbae061f72cccdc951a SHA-1: 25b362c13d312d909eb5d65ed2e6de86485ea6b7 SHA-256: af85d3f22299d42c5a7bdfdeee05ce2a2b907ad98ca49626cb270954d4f23d7f
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffset.ru/123?keyword=visual+argument+advertisement PDF link annotation
    • https://wurikosaradusif.weebly.com/uploads/1/3/1/3/131384544/zefagexutufipij_jikusiloso_mituliralelolo.pdfIn PDF document text
    • https://bubixoduxufito.weebly.com/uploads/1/3/1/0/131070588/telapuvikodiram.pdfIn PDF document text
    • https://satotujum.weebly.com/uploads/1/3/4/3/134308249/mapuzuxeb_gunov_nijika_koxufuziv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://likazusefo.files.wordpress.com/2020/11/simbolos_de_excel_y_su_funcion.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/logica_e_argumentao_juridica.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5970e410-7249-4436-bbc7-7376a4a0ae47/nba_finals_reddit_stream_game_5.pdfIn PDF document text
    • https://rolotoba.files.wordpress.com/2020/11/ganoton.pdfIn PDF document text
    • https://sapifotad.files.wordpress.com/2020/11/kupiwivuwas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff9d884a-e753-412a-bb8c-94af8bd372d5/bloody_jack.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/18281960014.pdfIn PDF document text
    • https://rezekine.files.wordpress.com/2020/11/tatojesanawav.pdfIn PDF document text
    • https://s3.amazonaws.com/wapabefizosumi/kasixezewizedub.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000783e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x783E 5172 bytes
SHA-256: 9a5d4044e1678553998df39d3e4f880d3a6056a47b1ee50599cca69fb4a719a0
font_01_sfnt_off000089c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89C2 9868 bytes
SHA-256: 198715ed0389f60d74423a81750867920e40c85def3ac88cae380d1c16ce84de