Malicious PDF — malware analysis report

Static analysis result for SHA-256 abde2800eb8ec1ee…

MALICIOUS

PDF

93.8 KB Created: 2021-07-29 18:53:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 27a00138c7d9a437d8fed6a3d71bc928 SHA-1: b4d85e4355438f04973329f2edc94c9fa28c4f9a SHA-256: abde2800eb8ec1ee80ffec87f63c568ce2043321cb24357253eb1857706a0f83
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised websites, many of which host further PDF files. This structure suggests a link farm designed to obscure the ultimate malicious destination, likely for phishing or malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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 link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/213cb2cb68e88e583deca612d300df0f/61542924896.pdf In PDF document text
    • http://planet-for-events.de/userfiles/file/vuvilazu.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608f2750b0464---58979218157.pdfIn PDF document text
    • https://stratasphere.online/userfiles/file/tefasaduxuduw.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/16076fb9063608---91428664520.pdfIn PDF document text
    • http://cokhihoangvinh.com/uploads/userfiles/file/sareroful.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d466ca7d44---88201176640.pdfIn PDF document text
    • https://equantumconsulting.com/files/files/pitabatavabisa.pdfIn PDF document text
    • http://ambulanceservice.pl/userfiles/file/tojurasebob.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/r6kku6bjothfvv64lelv17kfi7/xufubowotav.pdfIn PDF document text
    • http://cabin4kids.org/clients/0/05/050cd0fff5f75fdfd14851583cc0de74/File/78845963166.pdfIn PDF document text
    • https://rubyyadav.com/nbloom/fckuploads/file/fanegasusavenadeze.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606e5c8360ced---27421069942.pdfIn PDF document text
    • http://savaksangida.com/resimler/files/43328484386.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/e74c0aa3ec04d3458ee3442e694966cc/38209497202.pdfIn PDF document text
    • https://dbjadow.pl/attachments/file/jigamagepiv.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/k78j1ujaihc40sneosbblpu3g5/ripokotudomazavupa.pdfIn PDF document text
    • http://deficanderel.org/clients/6/67/674a09facce11b7629d390eef9534ff9/File/kawipolimufomapirutuva.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/0188d88e9af6edf3309cf7dfea39cd9d/fixusewediliwosefazu.pdfIn PDF document text
    • http://ranagro.com/files/59420354548.pdfIn PDF document text
    • http://agendatourvietnam.com/hinhanh/file/diniwaboxaxudigarituxowi.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/ce0dea2b6f8c0b141b7cc6b62c32e0dd/bonuzunawozurasujasibolo.pdfIn PDF document text
    • http://katachizu.com/img/news/files/goserozez.pdfIn PDF document text
    • http://willbramephotography.com/kexemotig.pdfIn PDF document text
    • http://berbun.com/user_img/file/dikegeribedopiviburab.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=amazon+prime+movies+hacked+apkPDF 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_off00010582.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10582 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011d94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D94 19832 bytes
SHA-256: 13c1da0c54ff0670ffc0eb03a08a66b5ba11f0b0754736b3e9335a07a06d97c0
font_02_sfnt_off00014fbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FBF 10836 bytes
SHA-256: e1457f55d10ee5f4b135ad871091a6376734dac79f1590f1c19fd58a9cd02561