Malicious PDF — malware analysis report

Static analysis result for SHA-256 c533cdde021b4b1b…

MALICIOUS

PDF

81.7 KB Created: 2021-02-04 00:47:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 395bd136d69aefcb1be3f1ea6152d80a SHA-1: 1dea5d3f6342ea27f0fc683e9d1b02ded4cc3410 SHA-256: c533cdde021b4b1bb25781b12e695f3193a304a021797e83f7b38fa7a505493d
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/aws?utm_term=arbitrary+waveform+generator+arduino PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4502236/normal_601153a907caf.pdfIn PDF document text
    • https://cdn.sqhk.co/ruvonusebex/ideH81H/pagibovepekixezofewenip.pdfIn PDF document text
    • https://cdn.sqhk.co/revikokelobu/djbHzKq/94840918605.pdfIn PDF document text
    • http://delayikapy.xyz/betuliropevipyw6n1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383913/normal_6018c82f06e4f.pdfIn PDF document text
    • https://cdn.sqhk.co/nukebomevobe/ehcoEws/rejogafodaramo.pdfIn PDF document text
    • https://cdn.sqhk.co/wepugozotap/ijhhjcl/best_live_stream_software_for_pc.pdfIn PDF document text
    • http://manybigs.space/7441646099740rui.pdfIn PDF document text
    • https://cdn.sqhk.co/temirikuji/jehic6h/shadow_of_war_arena_ai.pdfIn PDF document text
    • https://zukodefikarux.weebly.com/uploads/1/3/4/4/134498552/zapef-nuxawisa-powiromup.pdfIn PDF document text
    • http://menbp.online/pit_people_tier_list43wgg.pdfIn PDF document text
    • https://tufojeju.weebly.com/uploads/1/3/0/7/130740258/mukigoxorijigu.pdfIn PDF document text
    • http://milesnires.xyz/iphone_activation_lock_bypass_tool_maczhybf.pdfIn PDF document text
    • http://kayikciakademi.com/53050700770g5jx1.pdfIn PDF document text
    • https://cdn.sqhk.co/giboxikewev/hdzLhbS/kurigatonibevapimiso.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off000100af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100AF 5400 bytes
SHA-256: fcceb71592466b4fea6838119c656704303e61db147ae930be822e195d7fb651
font_01_sfnt_off0001131f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1131F 11392 bytes
SHA-256: 9fdeb925aaa04ca79817451a1babd465a2bcf47b86f5de8f7939dd086123865c