Malicious PDF — malware analysis report

Static analysis result for SHA-256 6441352aba460e55…

MALICIOUS

PDF

55.5 KB Created: 2020-11-06 22:30:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 1085a8aca2f3d701b56e3bef2bdbe189 SHA-1: 40e49991b88777af770e5fd7f6bd3b5ffef5d535 SHA-256: 6441352aba460e551b402843d28b7591f70362ab6802a05bd16aa5a1b20adb5e
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://trafftec.ru/123?keyword=pokemon+flashing+episode PDF link annotation
    • https://bakuwosir.weebly.com/uploads/1/3/0/8/130874569/disibub-nosibevile.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/8279037.pdfIn PDF document text
    • https://bawuzuxagoju.weebly.com/uploads/1/3/4/3/134340420/kudex.pdfIn PDF document text
    • https://diziwupufetut.weebly.com/uploads/1/3/4/4/134477772/xazikisofaxebujek.pdfIn PDF document text
    • https://rijizego.weebly.com/uploads/1/3/0/7/130776487/1902700.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://botebofeji.files.wordpress.com/2020/11/15963812645.pdfIn PDF document text
    • https://puvisazo.files.wordpress.com/2020/11/32845032647.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b3a4925-dcd4-4e79-ba55-9cf406f5f21c/diario_de_campo_ejemplo_preescolar.pdfIn PDF document text
    • https://pafegum.files.wordpress.com/2020/11/xumakosokidazok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c7abd0c-09c3-49c5-a43b-06aca3b702c3/dictamen_pericial_psicologico_ejemplo.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_off00006cbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CBE 13724 bytes
SHA-256: 4a5e418b8024d0824442a9fac002561f2f27d50680aa3aa12602955c9bc9bf4b
font_01_sfnt_off000099c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99C0 5424 bytes
SHA-256: 70c8220e42a6a9c03af5da1dcd327ff0cf5f16bec1ac6c9eca266394a449fad6
font_02_sfnt_off0000ac18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC18 10632 bytes
SHA-256: e9951e7f9f44e02cb3edb5872528d5a5f937813c00834a192d9c554c78af0c1b