Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9ddb344abe7b5cd…

MALICIOUS

PDF

85.7 KB Created: 2021-09-18 02:09:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 0bb13de9c2f1c1ad298daf0cda7f2d0a SHA-1: a812879ecf004960ad085ba9ad735e3ef8d18265 SHA-256: d9ddb344abe7b5cd4c6d0dd3174d6e6419a21ed3030f723c9a1c630a5de45701
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are associated with link farms and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://cructi.ru/uplcv?utm_term=shadow+vip+hack+free+fire+apk+download PDF link annotation
    • http://energy-labels.nl/userfiles/file/18345667713.pdfIn PDF document text
    • http://geerhannutpourreussir.be/docs/upload/files/26048979837.pdfIn PDF document text
    • https://homeuu.biz/upload/ckeditor/pages/files/rutusazaxapewaguj.pdfIn PDF document text
    • http://studiomarcheluzzo.it/userfiles/files/wusirale.pdfIn PDF document text
    • https://spyboarcams.com/files/34557845328.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-9-6/20210906122026228008.pdfIn PDF document text
    • https://ensegun2.com/ckfinder/userfiles/files/bapuzejam.pdfIn PDF document text
    • https://www.uflo.edu.ar/ckfinder/archivos/documentos/729870759.pdfIn PDF document text
    • http://aitrans.org/UploadFile/file/F1202109051625207939.pdfIn PDF document text
    • https://renetravel.ro/images/files/dodotajofusawe.pdfIn PDF document text
    • http://carbontuning.ru/file/43235396384.pdfIn PDF document text
    • https://www.pelicanfinancialnetwork.com/ckfinder/userfiles/files/28250395876.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/16136655da7dcf---63578164910.pdfIn PDF document text
    • http://sportsgarten.com/editorData/file/riwawalinivukilezikemu.pdfIn PDF document text
    • http://onfireinteriors.com/userfiles/10989346775.pdfIn PDF document text
    • https://matricula.netlandschool.cl/files/12121288437.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/cc6b94f0e6d2c32e2b9960a4c5626656/lazimaxexo.pdfIn PDF document text
    • http://jumpstart.mobi/userfiles/file/80274177918.pdfIn PDF document text
    • http://jatyn.cn/upfiles/202109/file/1631497226.pdfIn PDF document text
    • https://aneri12.cz/res/file/99594551713.pdfIn PDF document text
    • https://electrodomesticaruano.com/images/ckfinder/files/sazuxasivas.pdfIn PDF document text
    • http://gabinetortodontyczny.eu/userfiles/file/rasupu.pdfIn PDF document text
    • http://studiovalentini.eu/userfiles/files/povor.pdfIn PDF document text
    • https://robert-zauer.cz/userfiles/file/66499276378.pdfIn PDF document text
    • https://indicaperu.com/userfiles/file/24328468675.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://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_off0000e87f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE87F 18272 bytes
SHA-256: bfe6b8fd726808b80e2fdda0ae6d6439d9556a4b2d74c5dec6e1296089daf042
font_01_sfnt_off00011802.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11802 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013019.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13019 10772 bytes
SHA-256: 7f828c2e40696235f606d512b2e7bf4cbd10c7388e481998c1dc7db4ada6f0a4

Open this report in the interactive analyzer, or submit your own file for analysis.