Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee8df3103eeee293…

MALICIOUS

PDF

76.9 KB Created: 2021-04-05 17:28:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 9aba91a929bbb3d7f1eadc1e6981f966 SHA-1: 084cddf99e9b8134c3f92bfe1a126e43d6aec226 SHA-256: ee8df3103eeee29378e453d35e74c55e5b0243e5c001362fae37cc64f8e8933d
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains and link farms, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://botokaw.ru/award?keyword=biomass+energy+journal+pdf PDF link annotation
    • https://cdn.sqhk.co/juvebuzizej/DjjiaCp/nissan_skyline_gtr_r34_wallpaper_iphone.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368953/normal_5ff466c39d25b.pdfIn PDF document text
    • http://figimumagoko.mygamesonline.org/gifere.pdfIn PDF document text
    • http://zotoxilob.getenjoyment.net/resumen_de_la_biblia_genesis_por_capitulos.pdfIn PDF document text
    • http://zumewidife.mygamesonline.org/soil_mechanics_and_foundations.pdfIn PDF document text
    • https://cdn.sqhk.co/bugolajoxodu/ejaniaf/creare_sticker_iphone_da_foto.pdfIn PDF document text
    • https://cdn.sqhk.co/pafevola/dlKeETV/rovevufer.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409258/normal_5ffbd765ea839.pdfIn PDF document text
    • http://tujijamutibe.sportsontheweb.net/how_do_you_remove_a_stuck_tupperware_lid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483337/normal_5fd93148b470e.pdfIn PDF document text
    • https://cdn.sqhk.co/gogojelawov/bzjgic7/international_business_degree_requirements.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467306/normal_5fdea06c38c67.pdfIn PDF document text
    • http://vumonivaxozutod.mypressonline.com/ruvusu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382189/normal_6063ab1ce121c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471474/normal_6041877a444e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392652/normal_5fda3dfb3f38e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422908/normal_6050c5aeecaf0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369781/normal_5fd5f1e2e25f8.pdfIn PDF document text
    • https://cdn.sqhk.co/gibebomesani/foGifht/mozituzejiti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453115/normal_6020a5ee2e23d.pdfIn PDF document text
    • http://rewokujow.scienceontheweb.net/ethinyl_estradiol_and_drospirenone_davis.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/vonusirukete/survival_servers_ark_server_not_responding.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/puravaliputitexamited.pdfIn PDF document text
    • http://bogalibamadom.myartsonline.com/vesugofujipuzodafumoburu.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/44131401238.pdfIn PDF document text
    • http://lodumojokexiku.onlinewebshop.net/nupakalufuxaxizedede.pdfIn PDF document text
    • https://s3.amazonaws.com/gavapozalilup/dimumokepimigibom.pdfIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/everstart_maxx_starter_200_instructions.pdfIn PDF document text
    • http://zonafikepejese.onlinewebshop.net/derajagefevibixirawu.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_off0000ed62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED62 5588 bytes
SHA-256: de4b71d2ccfd26438731a2e606e7876887940ce3885085e9fb01e4bdcd4ef9e9
font_01_sfnt_off00010057.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10057 11240 bytes
SHA-256: c6c237e3811cc4f262f6d37702194b9fd0cd4b39d99b7123a28a4121bcc16e1e