Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e4a6e8b68b39a78…

MALICIOUS

PDF

82.6 KB Created: 2021-09-08 14:34:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0a02822e5a92f4bcda62471a2b0439d7 SHA-1: 867138e793c8d99072084d1bb606f247d126ae25 SHA-256: 0e4a6e8b68b39a78115783c5f97e696bce74e110dff9f157afd31dcc29a7ee1e
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which point to disposable hosting and are structured as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing. The presence of JavaScript suggests an attempt to execute malicious code or redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://360clothing.indicsys.com/home/www360cl/public_html/uploads/images/files/luwilunuxipunipo.pdf In PDF document text
    • http://tutek.eu/userfiles/file/guxabigupunedomixezozudi.pdfIn PDF document text
    • https://westhigienia.hu/editor_up/6923255858.pdfIn PDF document text
    • http://santiagoporter.com/js/ckfinder/core/connector/php/files/poziwuze.pdfIn PDF document text
    • https://www.frontiermyanmar.com/sites/all/libraries/ckfinder/userfiles/files/pegulezotefadapalor.pdfIn PDF document text
    • https://villatoscana-pi.it/userfiles/file/xebenekax.pdfIn PDF document text
    • https://eghamatyab.com/basefile/bainbookcom/files/kopimivevab.pdfIn PDF document text
    • http://naphotelbangkok.com/userfiles/files/rebarep.pdfIn PDF document text
    • http://interiorsexpress.biz/dayafter/uploadimages/newsimages/file/4149397772.pdfIn PDF document text
    • http://www.park-seversk.ru/other/js/ckfinder/userfiles/files/pomezevupakimojir.pdfIn PDF document text
    • https://bor-diing.com/upload/files/kunujol.pdfIn PDF document text
    • http://alltechsro.cz/files/43742465946.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/ca719e77037a50cc6e42586133ad4995/fefejonojazodepev.pdfIn PDF document text
    • http://glina-master.ru/admin/ckfinder/userfiles/files/nuzatega.pdfIn PDF document text
    • http://chiesamadremarsala.eu/userfiles/files/giboberekugoga.pdfIn PDF document text
    • http://sriagasthiyarastro.com/FCKeditor/userfiles/file/1810875056.pdfIn PDF document text
    • http://taiwanquinoafamily.com/shopadmin/upload/files/50462298637.pdfIn PDF document text
    • http://zzzwchem.com/upload/files/zenujovatotena.pdfIn PDF document text
    • http://mtjjt.com/2013/upload/article/files/210906092848186493tcdoo.pdfIn PDF document text
    • https://taksis.lv/taksis/userfiles/file/vomeputofamukawogigaza.pdfIn PDF document text
    • http://shqinze.net/admin/upimg/file///fetewagategewifarumap.pdfIn PDF document text
    • https://tekdalyapi.com/upload/ckfinder/files/levumazunejuvunomaxoziz.pdfIn PDF document text
    • https://heritagecambodiatravel.com/userfiles/file/89533971717.pdfIn PDF document text
    • https://konchris.com/userfiles/file/1630590926.pdfIn PDF document text
    • http://synphabase.ch/upload/file/29186732618.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=luxation+du+coude+pdfPDF 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_off0000dd3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD3A 10456 bytes
SHA-256: d07ab361a1348b2f28af1681c3f8d2b6abbaaa63d7b24bca4bbb65d18d770ff1
font_01_sfnt_off0000f518.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF518 18284 bytes
SHA-256: 3a7162a6f0aaea71903ca64259db8a5f4f62317af0673c8297a4ce6cdbc45613
font_02_sfnt_off00012319.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12319 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1