Malicious PDF — malware analysis report

Static analysis result for SHA-256 606c10c9bcce4c3d…

MALICIOUS

PDF

79.4 KB Created: 2021-03-06 10:12:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 93984576c4e03ca5e5f645a296050769 SHA-1: 280df4506d5a596315703b3d3d154f5f5d3531ee SHA-256: 606c10c9bcce4c3d6f379a917999a4a798394ef198831f8aedb3aa45f75e57db
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, indicating a link farm designed to redirect users. The 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics confirm its malicious nature, with ClamAV identifying it as a phishing trojan. The presence of external URIs and the overall structure suggest an attempt to distribute malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://nipisod.ru/award?keyword=excel+vba+select+last+cell+in+column+with+data PDF link annotation
    • http://cherrypimp.online/skyrim_dragonbone_sword_codepiyxr.pdfIn PDF document text
    • http://sayseedokg.com/sri_vishnu_sahasranama_stotram_in_sanskrit2ofyy.pdfIn PDF document text
    • http://nukicew.xyz/mokopuwiwubosuwosomu5hhn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446379/normal_600e5b4c4a678.pdfIn PDF document text
    • https://rawafutaxudux.weebly.com/uploads/1/3/4/0/134041345/9773721.pdfIn PDF document text
    • http://logvoz.ru/5904003738ymrg8.pdfIn PDF document text
    • https://cdn.sqhk.co/satukevaguka/ijcgfoE/texas_longhorns_college.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464850/normal_602be9a1bcea1.pdfIn PDF document text
    • https://cdn.sqhk.co/notudubugu/dM2zeig/wonawuputuzasisug.pdfIn PDF document text
    • https://rurinigumiza.weebly.com/uploads/1/3/5/3/135350695/6982102.pdfIn PDF document text
    • https://cdn.sqhk.co/vimewiki/iOvNijV/btd4_hacked_version.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412889/normal_602d91bfa5f07.pdfIn PDF document text
    • https://cdn.sqhk.co/fozuwasixeja/ehaW2kV/baby_jogger_city_elite_stroller_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/nujamuxeg/4gcggNf/eastern_lowland_gorilla_lifespan.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367665/normal_5fc66d7384b91.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/lebejos/jabariya_jodi_movie_songs_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/mefovu/38046560790.pdfIn PDF document text
    • https://s3.amazonaws.com/xirixepo/fluke_multimeter_87v_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/autocad_2015_3d_modeling_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/92883388748.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_off0000f170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF170 5400 bytes
SHA-256: 45d089d912e776891abc8ba75d12273600020cd1a8806b629878f0f87eb5b7d1
font_01_sfnt_off000103b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103B9 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off00010c47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C47 10196 bytes
SHA-256: f49cb8593809963cda04f50b10d7da8226e12510f7d55b2af773a4e5c69c22f0

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