Malicious PDF — malware analysis report

Static analysis result for SHA-256 9991e4828c5f8f4c…

MALICIOUS

PDF

34.4 KB Created: 2020-11-09 06:00:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: a4185ee58825d2b74f7417399b97b9b9 SHA-1: c7ae8957f191d74788a344b2fd0e5048c488b331 SHA-256: 9991e4828c5f8f4c3cb7116033d9d7c53d76f066457e5326271f8cbba0b87bd9
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/aws?keyword=duck+life+2+on+math+playground PDF link annotation
    • https://fogofude.weebly.com/uploads/1/3/4/3/134322730/dupuz_xawadogike_mawafakafa_tunebuzebu.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/038885c85ecf8f0.pdfIn PDF document text
    • https://vomediwanuxorat.weebly.com/uploads/1/3/4/3/134327005/zidovisetad.pdfIn PDF document text
    • https://mosodujisar.weebly.com/uploads/1/3/0/7/130739504/42d6366.pdfIn PDF document text
    • https://zulatikuwa.weebly.com/uploads/1/3/0/7/130776211/a7850825515b5.pdfIn PDF document text
    • https://gikoberi.weebly.com/uploads/1/3/0/9/130969260/f035a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fosavenu.files.wordpress.com/2020/11/bc_cs2a_batteriladdare.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22376056-8b25-40e6-b426-3703a13a9ee9/racecompatibility_esm_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9be131d7-2ae7-4cf4-9cdb-bcded0a1c1e1/street_fighter_2_how_to_unlock_akuma.pdfIn PDF document text
    • https://zegasaxum.files.wordpress.com/2020/11/33719047116.pdfIn PDF document text
    • https://poxojij.files.wordpress.com/2020/11/download_beautiful_creatures_in_hind.pdfIn PDF document text
    • https://fizafadolozu.files.wordpress.com/2020/11/31713389540.pdfIn PDF document text
    • https://xojagafudigo.files.wordpress.com/2020/11/titratable_acidity_of_milk.pdfIn PDF document text
    • https://sisiviweze.files.wordpress.com/2020/11/50939477702.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_off00004962.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4962 5688 bytes
SHA-256: 9bb2e546c25d690911b68ca174e6ed74fc0711ffacab8925cd1a40ff2e0a1265
font_01_sfnt_off00005cb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CB2 9456 bytes
SHA-256: b769da0816d895f8b8a2ec9758a54ce93a2ee19ccb1a9ab052efd9f773222cc2