Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa2776090df23991…

MALICIOUS

PDF

63.0 KB Created: 2021-02-11 00:13:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 650eaa4e7486e2b6de6bc6ea339eea85 SHA-1: 08181592ce8b042744975c185d689f44336e204b SHA-256: aa2776090df2399169722f51cf40919eb116b36a453de8cc37467acf4591d4ea
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/wb?keyword=anjathe%20full%20movie%20%20720p In PDF document text
    • https://cdn.sqhk.co/gusoguribus/FdgigfQ/8707539672.pdfIn PDF document text
    • https://cdn.sqhk.co/gefimiwotux/1xLO46M/bird_rescue_nj.pdfIn PDF document text
    • http://kixorita.22web.org/information_technology_management_for_business_northumbria.pdfIn PDF document text
    • http://ravitidi.22web.org/air_pollution_information_in_marathi_nishkarsh.pdfIn PDF document text
    • http://xaxifibipebux.iblogger.org/mefax.pdfIn PDF document text
    • https://cdn.sqhk.co/jugomuzuteb/icTiijc/kurepujipapovudesebisulig.pdfIn PDF document text
    • https://cdn.sqhk.co/defisepeniba/S2gdOX8/sky_gamblers_storm_raiders_2_cheats.pdfIn PDF document text
    • http://sabeladiwuz.22web.org/beatstep_pro_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/lukumuzu/gdLFrA7/most_viral_tiktok_video_2019.pdfIn PDF document text
    • http://stroymarketmetal.ru/vaillant_thermostat_instructions_vrt350ffqn9v.pdfIn PDF document text
    • http://texno3ua.com/tuwabebiluwiriv3mxna.pdfIn PDF document text
    • https://cdn.sqhk.co/noxuwitide/jcpgfhd/the_maxwell_house.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xuvunemomot.epizy.com/99958570309.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/star_wars_the_old_republic_companions_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/53256786156.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_off0000bac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAC1 5344 bytes
SHA-256: 475b1acb369535084d8c364d9be9cd1797f24b5b11167d63efee3a5508fdf91a
font_01_sfnt_off0000cce4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCE4 9968 bytes
SHA-256: f0694340264a757a022e16df1297600a1341fa1eb9ba7f613a40a2cf3634df8d