Malicious PDF — malware analysis report

Static analysis result for SHA-256 c26aff5fedd56250…

MALICIOUS

PDF

50.5 KB Created: 2020-09-30 17:11:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 64023a454aa459cb2d5e12c027d91cd5 SHA-1: 98a8bf27a42f8535f2366e2f06bf81cb68a6b30c SHA-256: c26aff5fedd5625040171fdc4738970b183d6acdb4fe8d7ddfd03f4970d4731a
132 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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=gaspard+de+la+nuit+sheet+music+pdf In PDF document text
    • http://gifesemus.mohannadgharaibeh.com/uploads/1/3/0/7/130775565/f09d8615c3762.pdfIn PDF document text
    • http://dogif.alexbaltodano.com/uploads/1/3/2/6/132696056/2cad32d.pdfIn PDF document text
    • http://gusoga.laurenthea.com/uploads/1/3/1/4/131437100/govitoxaboxa.pdfIn PDF document text
    • https://site-1036764.mozfiles.com/files/1036764/zewopisikotanuvotoves.pdfIn PDF document text
    • https://site-1038395.mozfiles.com/files/1038395/30473076891.pdfIn PDF document text
    • https://site-1037184.mozfiles.com/files/1037184/fuwovatupagarow.pdfIn PDF document text
    • https:////www.youtube.com/watch?vIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3997b0ab-3282-4ada-a78b-d86331836203/3242331157.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3afaaca-4034-4f95-a660-d94c5cea0379/jegabek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7261/8657/files/el_de_las_20_trocas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0360/8214/files/arrancame_la_vida_libro_angeles_mastretta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0457/8014/0188/files/white_tattoo_on_black_skin.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000055cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55CF 7036 bytes
SHA-256: 45a4d45cbd859d23cb927aadd5ae34deb54989f7e016046d87a3e868370619a8
font_01_sfnt_off00006e4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E4D 5428 bytes
SHA-256: 9acb4bbd4ab30d3d3355eac9a950bb59db3ae2249f6996d7908f46507dc6fe09
font_02_sfnt_off0000809d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x809D 10476 bytes
SHA-256: 88fafa73240ba31356f1207a2623151de44eeba4cd2cc5db2e37191a9f12d8b7
font_03_sfnt_off0000a450.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA450 16992 bytes
SHA-256: b13a5f460591493aa9e537df47484e4622e9a186ffe41cfd129d03cc68ec5b93