Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba61c79a8b1b846e…

MALICIOUS

PDF

65.6 KB Created: 2021-02-24 17:43:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 4b28887e0cbbfe9666a443a060d1d496 SHA-1: ebfbc419328fb7f6a94ecd8fdde895eb4f13cb3c SHA-256: ba61c79a8b1b846e02aa966e6f817d83afcdfecb204d4942d838ce2bc6bcff92
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wix?keyword=vocabulary+workshop+answers+level+d+unit+5 In PDF document text
    • http://zaxevef.getenjoyment.net/time_capsule_movie_cast.pdfIn PDF document text
    • http://mkr-olimp.info/lowikuvimovirinusexoxhxcwp.pdfIn PDF document text
    • http://mexicotop3.xyz/dogopibiranayavrn.pdfIn PDF document text
    • https://cdn.sqhk.co/kigifadarija/LgfojFC/mecca_video_live_wallpaper_for_android.pdfIn PDF document text
    • http://dumubemajizukov.medianewsonline.com/gabogowuli.pdfIn PDF document text
    • https://cdn.sqhk.co/linewebozid/idibgiz/rudiruxaputel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499995/normal_5fda1c295d702.pdfIn PDF document text
    • https://cdn.sqhk.co/nasanoroge/j1ja8ia/guess_movie_through_emojis.pdfIn PDF document text
    • https://cdn.sqhk.co/jojewezalika/cehgjS5/hotels_with_pools_and_waterslides_near_me.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/lolaritemukole/network_diagram_critical_path.pdfIn PDF document text
    • http://wubavon.epizy.com/57928209396.pdfIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/nutoxuvirovubusogaze.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/frome_livestock_market_reports.pdfIn PDF document text
    • http://widifusi.myartsonline.com/kisujawa.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_off0000c545.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC545 5708 bytes
SHA-256: 9e9a7de349435be2ee82825eaa5ee30d330c87092e9bd4e86bb219de929e351b
font_01_sfnt_off0000d8cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8CB 9480 bytes
SHA-256: 7604f0da5942f833863236046934b8e043f4d860a07423e53fe47d58c703913e