Malicious PDF — malware analysis report

Static analysis result for SHA-256 c128a5742d3072c1…

MALICIOUS

PDF

72.8 KB Created: 2021-01-27 19:26:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 7441eaa723e355569bcc361374b7d9a7 SHA-1: 3c39e7ccaac4ce68f6e0e5614a769544ed72a7de SHA-256: c128a5742d3072c1a76d4e460f449977244eba149b47ccd92f2b1c0935dc99f0
186 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
  • 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/wb?keyword=heart%20freeze%20instead%20of%20brain%20freeze PDF link annotation
    • https://gonotelavekufuf.weebly.com/uploads/1/3/4/6/134615299/tiziz.pdfIn PDF document text
    • https://mogatuzutixu.weebly.com/uploads/1/3/4/6/134684840/6612650.pdfIn PDF document text
    • https://guwifanifinib.weebly.com/uploads/1/3/2/7/132740319/3f169.pdfIn PDF document text
    • https://xumefuzodagugud.weebly.com/uploads/1/3/1/3/131384373/dupokatuketuki-tajoluguz.pdfIn PDF document text
    • https://samaruwopag.weebly.com/uploads/1/3/0/7/130738554/kifiboxekilolojifuxa.pdfIn PDF document text
    • https://nitavadokeja.weebly.com/uploads/1/3/1/1/131163909/fcda4d6248c434b.pdfIn PDF document text
    • https://tuxedibuzi.weebly.com/uploads/1/3/5/3/135350702/dc3e6d8.pdfIn PDF document text
    • https://cdn.sqhk.co/kawinojos/TSQAYgf/find_the_differences_a_cat_house_chapter_2.pdfIn PDF document text
    • https://bejeselujolir.weebly.com/uploads/1/3/1/3/131379719/bitodiri.pdfIn PDF document text
    • https://sarudutedax.weebly.com/uploads/1/3/1/4/131453649/7755814.pdfIn PDF document text
    • https://sunejojixin.weebly.com/uploads/1/3/1/0/131071277/7370200.pdfIn PDF document text
    • https://cdn.sqhk.co/kikolibub/KGgcia8/subezoremakukupegubajeta.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/kukazowox/minecraft_galacticraft_mod_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/punagilelabon/cisco_firepower_configuration_guide_6._2_2.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/rinujepaxadimuwudivomu.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_off0000e23b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE23B 5020 bytes
SHA-256: 74386be8e2969dad946724ad4fe91c2748bfd558ccf255744ae650fb814cc2e1
font_01_sfnt_off0000f361.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF361 10264 bytes
SHA-256: 18b57f43014467cde98c641d47439dfde7376eb1f74d5d40358fc2b0f1aa51b5