Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed606a8bbfa8e721…

MALICIOUS

PDF

70.7 KB Created: 2021-09-28 10:08:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: fc57b6433a1bc16fd616af075e0a305d SHA-1: 41f2d297de59b04f36bf069318f73a44a975b8be SHA-256: ed606a8bbfa8e721ce162d373813e5ab76f315ffb35edddbca140ea8a092f831
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to a link farm, a common technique for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9893

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://cr2tek.com/userfiles/Proj_Name/files/fifopafa.pdf In PDF document text
    • https://devcons.org/uploads/userfiles/files/86039602552.pdfIn PDF document text
    • http://hoaisonland.vn/upload/files/vodaxasinusetefefovibojo.pdfIn PDF document text
    • http://imhyuk.com/imhyukeditor/userfile/file/50477538450.pdfIn PDF document text
    • http://cnsgawefgl.netsociality.com/upload/files/26977976938.pdfIn PDF document text
    • http://zatoodesign.com/userfiles/files/xixexinobolulapevep.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613686063b620---7382521761.pdfIn PDF document text
    • http://khunghinhdepphuctin.com/media/ftp/file/getebogeliligo.pdfIn PDF document text
    • http://tylincms.com/userfiles/files/81910320351.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1613a4a1e52029---99899431149.pdfIn PDF document text
    • https://un7un9b3rl1pa7-99.com/contents/files/taduxi.pdfIn PDF document text
    • https://inprovitmexico.com/ckfinder/userfiles/files/femosefanokax.pdfIn PDF document text
    • http://gmtshipping.com/attachment/file/24788407573.pdfIn PDF document text
    • http://aotwresort.info/ckfinder/userfiles/files/diwutopokunudebegiseniguj.pdfIn PDF document text
    • https://cristalparkhotel.com.ve/ckfinder/userfiles/files/tulotem.pdfIn PDF document text
    • http://queenart.kr/userData/board/file/pabixixa.pdfIn PDF document text
    • http://fanti-fitness.pl/uploads/assets/file/loxademudoni.pdfIn PDF document text
    • http://aptwash.com/userData/ebizro_board/file/46313337157.pdfIn PDF document text
    • https://senegal4d.com/contents/files/4452881034.pdfIn PDF document text
    • http://jmvlpslimited.com/ci/userfiles/files/38890810190.pdfIn PDF document text
    • http://namadagaskare.ru/ckfinder/userfiles/files/66033964945.pdfIn PDF document text
    • http://fujiya-la.com/uploads/files/zipivuwijipud.pdfIn PDF document text
    • https://spbmworld.com/anaeter_capital/siteadmin/userfiles/files/xanubulonigugoniku.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/3a2320facdc0208d6e77a73962d0c1f5/ruzekogurufurivoguji.pdfIn PDF document text
    • http://karate-talence.com/newsite/userfiles/files/4254947652.pdfIn PDF document text
    • http://thesecurityguardunion.ca/userfiles/files/vofikonuzawajiri.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=how+to+sync+audio+and+video+in+androidPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b2f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2F8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cb0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB0F 10672 bytes
SHA-256: 1cc8c754546f3b90004b9c6c2874cec77b4a32e75e5cdc2465427dde438a1a89
font_02_sfnt_off0000e3bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3BD 16284 bytes
SHA-256: af5977d017f57332eb1550a780d2344bfbd98f48aed777d38f159fbaaad9c291