Malicious PDF — malware analysis report

Static analysis result for SHA-256 1754475e7fefa7ed…

MALICIOUS

PDF

72.3 KB Created: 2021-03-06 03:44:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 54d240652c69973e7ce4c6722dce888d SHA-1: ae96670e48f3b4e3eb4dd3fea9b06b4fb0128145 SHA-256: 1754475e7fefa7ed98f7ad2ea77b2db3454f5807837912c45fc2dd25b0f67b9f
126 Risk Score

Malware Insights

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

This PDF document is classified as malicious, exhibiting characteristics of a phishing lure. It contains numerous embedded URLs, many pointing to disposable hosting services, designed to redirect users to potentially malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of creating numerous links on disposable domains, often used to obscure the final malicious destination. The ML classifier and ClamAV detection strongly support its malicious nature.

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://golowaki.ru/strik?utm_term=universal+smart+led+tv+board+price+in+pakistan PDF link annotation
    • https://wufaderafezika.weebly.com/uploads/1/3/0/7/130776219/wixuliw_pusobuvijeluxit_sozum.pdfIn PDF document text
    • https://cdn.sqhk.co/tejurorado/hg3zjcs/tv_wallpaper_hd_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505102/normal_6006b34040878.pdfIn PDF document text
    • https://juwizezajofop.weebly.com/uploads/1/3/1/6/131637218/nawewutusuto-libamewo-muzumukotilep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454984/normal_6036160cc263d.pdfIn PDF document text
    • https://pikisavejalanab.weebly.com/uploads/1/3/3/9/133986241/puporijewesagovavas.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424328/normal_5ff1d0fc1f652.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500678/normal_603c0db3507f5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367947/normal_60073486bfbde.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421788/normal_601e3b7382215.pdfIn PDF document text
    • http://bekopomulasebi.getenjoyment.net/49741696166.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381318/normal_5fd9896195d26.pdfIn PDF document text
    • https://cdn.sqhk.co/jozazixefuf/jehhgfn/wood_carving_knife_blades.pdfIn PDF document text
    • http://rozujed.sportsontheweb.net/juwofelefumulixum.pdfIn PDF document text
    • https://cdn.sqhk.co/famuxina/Ihbhajb/doomsday_emergency-_food_kit.pdfIn PDF document text
    • http://xemizawufogutuf.scienceontheweb.net/fire_god_ps4_price.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/vokeri/school_uniforms_uk_law.pdfIn PDF document text
    • https://s3.amazonaws.com/vizegemawokaxe/fapeneretudubobimuzovo.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_off0000dc41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC41 5472 bytes
SHA-256: 4644f402d672ab37e291d20bc8ce7a6d86bd26abb8a8abcc80567dac4db3528e
font_01_sfnt_off0000eed0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED0 10864 bytes
SHA-256: 97a5b6d74fcf974fdea0429a2040cbc280f42dd1324651eaf0a961efc83d2312

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