Malicious PDF — malware analysis report

Static analysis result for SHA-256 dee6894045023d31…

MALICIOUS

PDF

112.9 KB Created: 2021-03-07 03:55:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ad2fad2bbcd1a319d16c015fc869a26b SHA-1: 0919a59186de454d0355ab956c7e2a8b6954273a SHA-256: dee6894045023d312e40c98d99e637f581e195b2f3fb6e9e4fd6aa831b2f7657
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a high heuristic firing indicating it's a link farm on disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the presence of many external links points to an attempt to redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://mezovuduw.ru/wix?keyword=robbie+hemingway+text+god+program+reddit PDF link annotation
    • http://bovewitavivebu.getenjoyment.net/basabudotekudabobupon.pdfIn PDF document text
    • http://gojavodevagajuw.mygamesonline.org/52662634651.pdfIn PDF document text
    • http://zugemenelil.medianewsonline.com/gomigozejudu.pdfIn PDF document text
    • http://mitedujonajezed.scienceontheweb.net/51095714926.pdfIn PDF document text
    • https://cdn.sqhk.co/moserusoba/jejckBV/escape_room_mystery_word_level_38.pdfIn PDF document text
    • http://nizulekun.iblogger.org/kifiwetejepoxesizajot.pdfIn PDF document text
    • http://busowalukifejel.22web.org/nisuvopu.pdfIn PDF document text
    • http://widonatozeg.mypressonline.com/cosmos_carl_sagan_ebook_download.pdfIn PDF document text
    • https://cdn.sqhk.co/jelasusoved/gdidqk1/potogopovewudifazudevi.pdfIn PDF document text
    • http://lalikexitaxixix.getenjoyment.net/what_does_the_philosophy_of_nature_mean.pdfIn PDF document text
    • https://cdn.sqhk.co/giripiponi/iyrpysm/rapefudowana.pdfIn PDF document text
    • https://cdn.sqhk.co/melipetoluf/hODGhii/29591007189.pdfIn PDF document text
    • http://bobixina.getenjoyment.net/guparoniden.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://pitefabe.epizy.com/math_minutes_7th_grade_worksheets.pdfIn PDF document text
    • http://zikimopotefeva.epizy.com/30518821173.pdfIn PDF document text
    • http://vomoguzidazufi.rf.gd/37903350491.pdfIn PDF document text
    • http://momomalolo.epizy.com/nosql_database_design_guidelines.pdfIn PDF document text
    • http://nibemodida.myartsonline.com/cen-tech_digital_multimeter_model_69096.pdfIn PDF document text
    • http://kojuvurapamox.myartsonline.com/libro_amor_y_respeto_dr_emerson.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/real_estate_flyer_template_publisher_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fekife/air_camera_apk.pdfIn PDF document text
    • http://ziwivazud.onlinewebshop.net/how_much_do_entry_level_cpa_make.pdfIn PDF document text
    • http://xadamodovupeniz.rf.gd/fishing_report_nj.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000170eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x170EB 5360 bytes
SHA-256: a34144ffc057418698e49373edceb68866670074c0b1d5448a29c2442af69375
font_01_sfnt_off0001830a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1830A 10744 bytes
SHA-256: 0ce76f6a5f8fca23e28647be71f63ae1b2997b37861b4b8e5b1109553cc09e93
font_02_sfnt_off0001a79e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A79E 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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