Malicious PDF — malware analysis report

Static analysis result for SHA-256 865c566c3fef3c2f…

MALICIOUS

PDF

72.1 KB Created: 2021-02-14 03:51:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: a9a12c3ccb0b54f39286815f533b33e7 SHA-1: a02a88ef654eddd043fbb2f7852a1499b1c43751 SHA-256: 865c566c3fef3c2f8226276cdc7a1483ea9515833be184581101ba71749526cd
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wb?keyword=atlanta%20falcons%20injury%20report%20week%2014 In PDF document text
    • https://kafememum.weebly.com/uploads/1/3/4/6/134616831/4116092.pdfIn PDF document text
    • http://bottlechainworld.com/railway_crossing_traffic_signal7hh6n.pdfIn PDF document text
    • https://cdn.sqhk.co/litonesi/igEMghP/blade_bouncer.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496818/normal_5fec4002a6d05.pdfIn PDF document text
    • http://national-verifyteam.com/analysis_of_survival_data_cox_oakesx57h0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403141/normal_5fd79765cc923.pdfIn PDF document text
    • http://foodguideblog.com/147916116742cfm2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369512/normal_601f5457b6b62.pdfIn PDF document text
    • https://vawemuziz.weebly.com/uploads/1/3/5/3/135351027/duwoxujubeg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414334/normal_602493ea95391.pdfIn PDF document text
    • http://homiak.fun/adobe_acrobat_pro_2017_windows_free484lz.pdfIn PDF document text
    • https://cdn.sqhk.co/vujenibolo/i8yMLja/dojaku.pdfIn PDF document text
    • https://cdn.sqhk.co/gukokefa/1nhcXid/love_letters_movie_1984_watch_online.pdfIn PDF document text
    • https://cdn.sqhk.co/lepudijazur/egjhaif/business_international_group_llc.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/lunojol/45197646919.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_off0000d8fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8FB 5472 bytes
SHA-256: 84312940730a2744fd20c2c6c31cb0ed2af8b8e3426b2b70d0d5a39416028e89
font_01_sfnt_off0000ebd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD6 12012 bytes
SHA-256: 186648dc0dbd1d5d2e284fe0ae74c153dad7466bcfa7fb46cf9bf120d64e8d0a

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