Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b75b4be072d00f5…

MALICIOUS

PDF

54.5 KB Created: 2020-11-08 13:17:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 196fead470043c9dce1090a5ad884173 SHA-1: 6b3d7a3f230edd49ce07153cadb65e0589c39be9 SHA-256: 2b75b4be072d00f55d32f9589b28dc2680cf6691227784f19121442a5cd223ff
136 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=carf+behavioral+health+standards+manual+2018 PDF link annotation
    • https://xokirolo.weebly.com/uploads/1/3/4/3/134394744/rusosigumejekapijap.pdfIn PDF document text
    • https://lijipipixeralof.weebly.com/uploads/1/3/3/9/133999964/tadekosonak_milezi_jupuwo.pdfIn PDF document text
    • https://vedakevuvapi.weebly.com/uploads/1/3/4/0/134013486/xixokofimagulis.pdfIn PDF document text
    • https://mapipuluzobeb.weebly.com/uploads/1/3/1/3/131398440/pebudo_tataz_busezefalikir.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/vepulakanug.pdfIn PDF document text
    • https://pawusimogi.weebly.com/uploads/1/3/4/4/134444718/bitagigukarozana.pdfIn PDF document text
    • https://toxoladosa.weebly.com/uploads/1/3/4/4/134479392/870152.pdfIn PDF document text
    • https://nogulumu.weebly.com/uploads/1/3/4/4/134476008/rufekip_sipixuse_kizuz.pdfIn PDF document text
    • https://xenolonaloku.weebly.com/uploads/1/3/4/4/134458783/tonulijos.pdfIn PDF document text
    • https://fejamelaluboj.weebly.com/uploads/1/3/4/3/134311679/153b747c3c7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pojojagajevuxa/bukufiginidubanuwulifu.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/how_to_get_to_cinnabar_island_red_version.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/andy_wilson_nh.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/genero_definicion.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/lonesudu.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/20672101979.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/6978687977.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_off00009668.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9668 5772 bytes
SHA-256: 53460231f8e9cb200d9b9e709e9b66ead9db518ad47fc0d683f7c9a0fa92680b
font_01_sfnt_off0000a9e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA9E6 10136 bytes
SHA-256: ac906b38c39847951a904c63f40bb275b78882b0eed7518cb9065934ba488b4e