Malicious PDF — malware analysis report

Static analysis result for SHA-256 23d9cdae8b4396d1…

MALICIOUS

PDF

68.1 KB Created: 2021-02-13 00:28:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: d2f7fe9689b39acd9cf584287c4ca7d3 SHA-1: 63cb1294689ef4ca473ae7415222e0f1a5ae48b9 SHA-256: 23d9cdae8b4396d15137732e7046b673abe7fe61d4f2b9eafb7abdb130afd587
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://jottigo.ru/aws?utm_term=new+facebook+lite+application PDF link annotation
    • https://piwomokoxik.weebly.com/uploads/1/3/5/3/135335333/3011765.pdfIn PDF document text
    • https://cdn.sqhk.co/wojusipi/yzjchag/86504388272.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379363/normal_600ff1859c9d4.pdfIn PDF document text
    • http://load-bcp.com/igcse_ict_computer_networks_worksheets1e9p3.pdfIn PDF document text
    • https://cdn.sqhk.co/futevanu/jfjihVZ/fakepizu.pdfIn PDF document text
    • https://cdn.sqhk.co/madeparev/e6hfYgg/17203317447.pdfIn PDF document text
    • https://taxajoberaruvu.weebly.com/uploads/1/3/4/3/134320235/wasibibi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488130/normal_5fde650eb7676.pdfIn PDF document text
    • http://ipai.online/funexetatukakizan80yul.pdfIn PDF document text
    • https://cdn.sqhk.co/letaziseb/RhitibY/office_space_background_images.pdfIn PDF document text
    • https://cdn.sqhk.co/kewesowovim/ihgaNUm/fastway_cross_3d_game.pdfIn PDF document text
    • https://cdn.sqhk.co/lizupasepafu/Tjhjchc/35258959895.pdfIn PDF document text
    • http://espaceclient-cmb.com/tuxepomakfksg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504554/normal_6011b60f38e7e.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/legenapi/wowixogu.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_off0000cf19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF19 5000 bytes
SHA-256: d69c04678f3d09dd8a36623dd3e3641f0441f2879f5c81c118406eb2477c19eb
font_01_sfnt_off0000e053.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE053 10304 bytes
SHA-256: b899330ab7c1205f84117a921b374944f88384648373fc193887bac32e4ebc71