Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c5e79e432916396…

MALICIOUS

PDF

44.8 KB Created: 2020-11-07 06:48:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: b722f2e6146d8a96c0763b3b1bed63f4 SHA-1: 2e4c9f3f3bf58f2a9c7adfe60ae57f21e22fd84c SHA-256: 2c5e79e43291639639a3b1438d38d8f92aa432ca707df58f397f81bfc7d69ee8
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://trafffi.ru/aws?keyword=triangle+proof+worksheets+with+answers PDF link annotation
    • https://wejakoguxi.weebly.com/uploads/1/3/4/3/134324676/zezitowezetawezeni.pdfIn PDF document text
    • https://zimiduninu.weebly.com/uploads/1/3/1/6/131637103/3977069.pdfIn PDF document text
    • https://wotapidedodibi.weebly.com/uploads/1/3/4/4/134475573/mewazosavep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368788/normal_5f95cbc52676b.pdfIn PDF document text
    • https://wosezobar.weebly.com/uploads/1/3/1/8/131856012/wakenutikugeza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391642/normal_5f97019837991.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://dawaratuni.files.wordpress.com/2020/11/ccg_cable_gland_catalogue.pdfIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/we_vs_us_birds_in_row.pdfIn PDF document text
    • https://zatejoru847961968.files.wordpress.com/2020/11/72489844693.pdfIn PDF document text
    • https://xasuxedizos.files.wordpress.com/2020/11/togok.pdfIn PDF document text
    • https://zukujizaleli.files.wordpress.com/2020/11/sufujefavu.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/62002891744.pdfIn PDF document text
    • https://gozudutonak.files.wordpress.com/2020/11/bovufibubodafotibibusudu.pdfIn PDF document text
    • https://botebofeji.files.wordpress.com/2020/11/15963812645.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_off00007209.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7209 5268 bytes
SHA-256: 2e7acd34c30094001accd792a9997ef15eda63a6753f840bfc1ba6d390db6b62
font_01_sfnt_off00008407.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8407 10028 bytes
SHA-256: 80f5608ee3a73a4c25ab833809908ac71ae833c4358445ec8d9119c0ba36513c