Malicious PDF — malware analysis report

Static analysis result for SHA-256 14e2a64b1e5b7486…

MALICIOUS

PDF

77.0 KB Created: 2021-10-07 09:09:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: fe31462c114f78914c5a19de1cc8692f SHA-1: 342e94d2b1b3eaf9e025685deafba6e6bc7417f4 SHA-256: 14e2a64b1e5b7486159a7ebf35378e655cf6f09ad3dd1878198bd2dd2c49e4d3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to suspicious domains and appear to be part of a link farm designed to obscure the ultimate destination. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it is designed to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 http://wsystem.sk/userfiles/files/xogumesibiweket.pdf In PDF document text
    • http://perksys.com/userfiles/file/22994594497.pdfIn PDF document text
    • http://mp-journal.com/media/file/segufedewaxup.pdfIn PDF document text
    • http://ctmmaximoravenna.com/ckfinder/userfiles/files/bakabodopurodagix.pdfIn PDF document text
    • https://projektovanje.info/userfiles/file/4631037572.pdfIn PDF document text
    • http://ksiclub.org/projects/achievemore/admin/upload/fckImages/file/vofobijimijamoxuzoju.pdfIn PDF document text
    • http://stickerbarcode.com/file_media/file_image/file/12091676739.pdfIn PDF document text
    • http://solarexperten.ch/fckeditor/editor/images/file/degisepakemuf.pdfIn PDF document text
    • http://kechengchem.com/upload/files/mideju.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/6f51c1588565418b75a9d5d6537f0dc4/84687194754.pdfIn PDF document text
    • https://ikitellirezistans.com/upload/files/17178148789.pdfIn PDF document text
    • https://academiesutherland.com/userfiles/file/53769750240.pdfIn PDF document text
    • http://www.mariabeckmann.com/fotos/uploads/files/81416420340.pdfIn PDF document text
    • http://fsnmmaterials.com/UPFILE/userfiles/files/47295690220.pdfIn PDF document text
    • http://phone-server.com/userfiles/file/lorutadadezoposizatasunis.pdfIn PDF document text
    • https://griby.biz/ckfinder/userfiles/files/teruzigimot.pdfIn PDF document text
    • http://train-in-japan.com/images/blog/file/xonutogigugekirabez.pdfIn PDF document text
    • http://theleadershipworks.com/PO2/UPFILE/userfiles/files/noximinulovakilenudo.pdfIn PDF document text
    • http://vakantie-noordlimburg.nl/ckfinder/userfiles/files/47293626627.pdfIn PDF document text
    • https://namkhoasaigon.vn/web/images/files/82881844861.pdfIn PDF document text
    • http://www.evisiontiendaonline.com/ckfinder/userfiles/files/92849820345.pdfIn PDF document text
    • http://simonhoirup.dk/userfiles/file/93883464591.pdfIn PDF document text
    • http://mopi.eu/ckfinder/userfiles/files/64611523095.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=clairemont+driving+test+routePDF 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_off0000c941.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC941 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e158.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE158 10788 bytes
SHA-256: 96c580f9411d3926b80b847ea483d1e8e15490a9e4faa14f35cf56304211feb7
font_02_sfnt_off0000f9fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9FB 17484 bytes
SHA-256: 8579a4d243c3ae1bfa4463838a50add18ec80fbfc2bcda4330061e9745573a44