Malicious PDF — malware analysis report

Static analysis result for SHA-256 23a9f4724354785c…

MALICIOUS

PDF

79.4 KB Created: 2021-04-15 04:51:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 49c70796a97af1abd8604c3daefe72eb SHA-1: 7a8802ed68531edb23d26afb798ef77c910c3db2 SHA-256: 23a9f4724354785cd265355589e64437f9671a7a241af8c10e2f5cc29c7d925a
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting services and appear to be part of a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, contains text related to COVID-19 lockdown information, suggesting a lure to trick users into visiting the malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://zajinet.ru/strik?utm_term=what+states+are+not+in+lockdown+for+coronavirus
    • https://dugemitisij.weebly.com/uploads/1/3/1/4/131409309/zaburusebar.pdf
    • https://popokafiri.weebly.com/uploads/1/3/1/4/131437291/2955124.pdf
    • http://dedaruk.scienceontheweb.net/hammurabi_code_laws.pdf
    • http://wumewil.sportsontheweb.net/bsa_m20_parts_list.pdf
    • https://kesupegujofoju.weebly.com/uploads/1/3/5/3/135388852/lonikorazopufaje.pdf
    • https://cdn.sqhk.co/zivudasexoni/hfFiihj/88997028913.pdf
    • http://gepavozo.mygamesonline.org/architecture_portfolio_template.pdf
    • http://sifisomatexow.sportsontheweb.net/goldman_cecil_medicine_download.pdf
    • http://xamawigokoke.mygamesonline.org/fagaxabonekogoperofe.pdf
    • https://cdn.sqhk.co/xurawupo/1sjjicN/princess_daughter_beauty_sparkling.pdf
    • http://paxezot.getenjoyment.net/the_difference_between_descriptive_and_inferential_statistics.pdf
    • https://zatugole.weebly.com/uploads/1/3/1/8/131856706/d76a5.pdf
    • https://cdn.sqhk.co/maxevurux/faZgfig/frontline_commando_2_apk_mod_download.pdf
    • https://cdn.sqhk.co/rasetiwulipu/bsZ8kJd/can_t_use_magic_wand_tool_in_illustrator.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://95049c82-e412-4913-a0b0-e03e83d5170a.filesusr.com/ugd/127d6e_13d75b0849f64aee85eff408ebf348b2.pdf?index=true
    • https://68358877-4ee6-4e53-94f7-4bd9665c1f53.filesusr.com/ugd/3bbd68_30b1348283354e6b96b215f98a5d9de3.pdf?index=true
    • https://39dd5e1d-a581-41ec-a80f-9e19245c660f.filesusr.com/ugd/c2656d_5f68a02b97b340e5963f9d9350b03da9.pdf?index=true
    • https://s3.amazonaws.com/debiwelof/weber_genesis_2_e310_vs_spirit_e_310.pdf
    • https://s3.amazonaws.com/wozowuledij/bazarifuvonudojejewegub.pdf
    • http://pogetowem.onlinewebshop.net/how_to_read_music_notes_trumpet.pdf
    • https://s3.amazonaws.com/jupudizadid/competitive_analysis_template_example.pdf
    • https://907864b8-ab38-4b43-b195-7646ee37c451.filesusr.com/ugd/c4b402_a91e511e0d0b4781a720d9480cb4a788.pdf?index=true
    • http://wuwedilejom.myartsonline.com/sinizobomemigaj.pdf
    • https://s3.amazonaws.com/vitelitubovuluj/vifilasojum.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6cb.bin
84f0d7f0caf18d552e8149ac5ec7b0b635314c06b7144cdba9b61e59dba78c45		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6CB 5336 bytes
font_01_sfnt_off0001090c.bin
d904b76fd55a5dffd3671d244a5f15023780eb1ab894ca219cef367cf83c99ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1090C 11328 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.