Malicious PDF — malware analysis report

Static analysis result for SHA-256 73a4cbe0108fd6a6…

MALICIOUS

PDF

70.0 KB Created: 2021-02-11 15:01:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 3a5d9f08eecd28964f8ef8e0cace5ee3 SHA-1: 8f2b820f7e4ed9d054a0e6cd15a3838c1ebee374 SHA-256: 73a4cbe0108fd6a6e07786b179a02dc9c4876cac063f11280eb4b5680e1654f1
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://jacksth.ru/wix?keyword=cells+crossword+puzzle+answer+key PDF link annotation
    • https://tivuwamivubi.weebly.com/uploads/1/3/5/3/135384825/d25c22d5d1411e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496005/normal_5fca12d82c2ff.pdfIn PDF document text
    • https://cdn.sqhk.co/wenudiwome/gfpfVgf/hocus_pocus_spell_book_quotes.pdfIn PDF document text
    • http://hookup157.online/bibawo_by_eddy_kenzo_mp4wos9r.pdfIn PDF document text
    • http://giocodigital.space/oxygen_not_included_mealwood_farm851j0.pdfIn PDF document text
    • https://cdn.sqhk.co/faxinomitux/hbBIhiy/10520324713.pdfIn PDF document text
    • https://cdn.sqhk.co/kurinunuwor/ahgacgf/among_us_online_para_mac.pdfIn PDF document text
    • https://cdn.sqhk.co/kapidibewomu/Eihhhja/risebodomig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458125/normal_6014f932af80b.pdfIn PDF document text
    • http://future-techno.ru/vegidujizozuzetoresov2425l.pdfIn PDF document text
    • http://agnewjacobs.com/kavikerevagosumamrwyy.pdfIn PDF document text
    • https://pudisemibupar.weebly.com/uploads/1/3/4/0/134096773/devoxel_nuserowowo_tawaki_jozipevaxofar.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389355/normal_5ffe0f91a8842.pdfIn PDF document text
    • https://cdn.sqhk.co/rajunakeb/gfGhchj/58070329908.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
    • https://s3.amazonaws.com/fukepez/minecraft_crafting_guide_1._8_mod.pdfIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/ronafataxija.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_off0000c937.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC937 5152 bytes
SHA-256: 3f2acdd80eb7ddf7b8a51366528d6272d850d35e0e315f8231958ebb5ef7d19c
font_01_sfnt_off0000dae1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE1 9968 bytes
SHA-256: 6840ec784e8915c560d72953a2f2fd11c9bb8cce421099f93d87068e2986d2d8
font_02_sfnt_off0000fcf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF0 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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