Malicious PDF — malware analysis report

Static analysis result for SHA-256 b98299e2acf5da79…

MALICIOUS

PDF

77.6 KB Created: 2021-02-25 23:42:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: d6b772cb64833b91d64cd38b856579eb SHA-1: d07c0125cfca6d0f36ea381942140a4f6a503619 SHA-256: b98299e2acf5da79e5ad3dfc86109baf91a9645767a5b045036d3ef57395d2eb
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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://druttle.ru/strik?utm_term=the+republic+of+plato+book+8+summary PDF link annotation
    • http://xevusezes.medianewsonline.com/pretty_little_liars_season_4_episode_2_cast.pdfIn PDF document text
    • http://pofaduxiruk.getenjoyment.net/xbox_360_controller_pc_adapter_setup.pdfIn PDF document text
    • https://sagelaxun.weebly.com/uploads/1/3/4/5/134594749/dofebezomasub_gegodat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412996/normal_5fd98fd40b2d3.pdfIn PDF document text
    • https://mivetemadika.weebly.com/uploads/1/3/4/4/134471856/5d02c8cb2.pdfIn PDF document text
    • http://betijeduw.getenjoyment.net/konosuba_light_novel_english.pdfIn PDF document text
    • http://gisoboxizaza.mygamesonline.org/58357678005.pdfIn PDF document text
    • http://vazawujuzu.sportsontheweb.net/xesatafivuwigixotisoz.pdfIn PDF document text
    • http://mibamixuxonewu.22web.org/63078758941.pdfIn PDF document text
    • http://bumumapa.mypressonline.com/temojidelavaki.pdfIn PDF document text
    • https://renobikedasel.weebly.com/uploads/1/3/4/8/134897329/giribaperagovubo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dowuvoduwitovos.atwebpages.com/porter_cable_nail_gun_repair.pdfIn PDF document text
    • http://mumaxididinep.rf.gd/kawasaki_motorcycle_engine_number_decoder.pdfIn PDF document text
    • http://wuduzukatej.epizy.com/kannada_love_feeling_album_video_song.pdfIn PDF document text
    • http://kivozusemu.atwebpages.com/rancilio_silvia_e_v6_espresso_coffee_machine_2020_model.pdfIn PDF document text
    • http://jokosen.atwebpages.com/how_much_is_tydus_talbott_worth.pdfIn PDF document text
    • http://gipanitefoj.epizy.com/61666953913.pdfIn PDF document text
    • http://tobavukopipe.epizy.com/administrative_theory_by_henri_fayol.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_off0000f42f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF42F 5704 bytes
SHA-256: 7384ac741fed38b27609a363b8956e502572cdabf59fb93b478ca80218bd5bee
font_01_sfnt_off00010770.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10770 9792 bytes
SHA-256: 062b63ebb104ec9b97d0d7696b9be7a8972ee755d0fba440a1244c622e0475e5