Malicious PDF — malware analysis report

Static analysis result for SHA-256 657bb36e51f7c3ab…

MALICIOUS

PDF

77.8 KB Created: 2021-02-17 00:02:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 876c1f92f8b729e26e41a3d0c7e2c63c SHA-1: 9b902e87bbc0c68d8a9c47c4258083b637c559ad SHA-256: 657bb36e51f7c3abfbed76c230550b319ba099af64f825b4c4c52aa3274892f9
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/wb?keyword=why%20is%20a%20mother%20kangaroo%20unhappy%20when%20it%20rains%20answer%20key PDF link annotation
    • https://cdn.sqhk.co/kezixowog/jjaRgcG/gusumevonu.pdfIn PDF document text
    • https://cdn.sqhk.co/gonolesuzam/eiigehd/instagram_story_archive_not_showing_viewers.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500882/normal_60068e1d71cef.pdfIn PDF document text
    • https://fogufapepupol.weebly.com/uploads/1/3/1/8/131871477/duzafejasorexugu.pdfIn PDF document text
    • https://roxilegetewus.weebly.com/uploads/1/3/4/7/134721251/rapisor.pdfIn PDF document text
    • https://figapizezedop.weebly.com/uploads/1/3/4/3/134364787/660c6e772.pdfIn PDF document text
    • https://sipigatijuk.weebly.com/uploads/1/3/3/9/133999294/xegekikapubigu-xupid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425759/normal_6024f48bde1cf.pdfIn PDF document text
    • https://cdn.sqhk.co/jawutuwek/9Cjh0QS/lisovobivuximaka.pdfIn PDF document text
    • https://cdn.sqhk.co/muligumixe/hf7jjRo/84464914190.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469351/normal_60092652247d1.pdfIn PDF document text
    • https://cdn.sqhk.co/rebamomidaw/Ryv5gcp/custom_superhero_suit_maker.pdfIn PDF document text
    • https://cdn.sqhk.co/vufebevefo/Sjfijje/youtube_vr_app_apk_download.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/lodazojamuva/49205789417.pdfIn PDF document text
    • https://s3.amazonaws.com/vogubivajavofu/2447492225.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_off0000f182.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF182 5472 bytes
SHA-256: 684d00ad145af981bf7f131ddaae4f7c0df5bff5ab8fb44a09f382846e2b75af
font_01_sfnt_off00010413.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10413 11140 bytes
SHA-256: 29076bbf017d6e19325acfa1a910cf1b63f526eece6413001df7e81f051b3447