Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae38ebf8a97b4aed…

MALICIOUS

PDF

81.2 KB Created: 2021-09-23 04:16:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 3aaee2ceb6bfa7dc6fb321bb72373857 SHA-1: 01f1907a92c43ee1caa01bcc202e49628dd972da SHA-256: ae38ebf8a97b4aed230bb1e92f8372193b6a80bdc1d2bee910497845bae68974
134 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The presence of numerous external URIs, many pointing to PDF files on various domains, suggests a link farm or redirection mechanism intended to lead the user to malicious content. ClamAV detection and ML classification strongly indicate malicious intent, likely for phishing or malware delivery.

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://www.domaine-boussard-chablis.fr/ckfinder/userfiles/files/bovadixoxamut.pdf In PDF document text
    • http://jrmhandling.nl/upload/file/mipizarerigazazani.pdfIn PDF document text
    • https://tahuacoop.com/cms_gpadmin2015/sgi_userfiles/userfiles/files/92366864133.pdfIn PDF document text
    • http://avvocatoandreabruschi.it/userfiles/files/gadugisakavidipanu.pdfIn PDF document text
    • http://debseven.net/UserFiles/File/dezexiwipoji.pdfIn PDF document text
    • https://togeltop.com/contents/files/sovimuxa.pdfIn PDF document text
    • http://deforma.it/userfiles/files/26521759898.pdfIn PDF document text
    • https://vibingvibes.com/userfiles/files/muvixibenukonuloxepigexa.pdfIn PDF document text
    • http://myslizdrave.com/soubory/dopurafusuxitigakelov.pdfIn PDF document text
    • http://tufaghanafc.com/js/ckfinder/userfiles/files/lelerafij.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161496c9e512be---wavazapeza.pdfIn PDF document text
    • https://cingenito.ca/upload/editor/file/foverubirobudutalobixikun.pdfIn PDF document text
    • https://baohohoanglong.com/userfiles/file/11510523969.pdfIn PDF document text
    • http://dobraukraina.org/sites/all/sites/dobraukraina.org/files/lalekilivokoxedugisiwagi.pdfIn PDF document text
    • https://clarkfamilybuilders.com/home/clark/public_html/ckfinder/userfiles/files/pekuburuw.pdfIn PDF document text
    • https://hmradiatoriai.lt/images/files/51173811152.pdfIn PDF document text
    • https://hattshopping.com/admin/assets/images/ckfiles/20012497634.pdfIn PDF document text
    • http://hijoin.hu/editor_up/27374493942.pdfIn PDF document text
    • http://3q1p.com/upload/file/2109101201554922519glt8gw9xlf3.pdfIn PDF document text
    • http://hndgyl.com/v15/Upload/file/2021917655561848.pdfIn PDF document text
    • http://monarchiaerembolt.hu/tmp/jopotajiletidalupozawev.pdfIn PDF document text
    • https://adurucui.com/ckfinder/files/96320299864.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/p323l84pbncrso8kd3c5kg6g96/nodarusifatoz.pdfIn PDF document text
    • http://kalikraft.com/images/file/95135667664.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=free+xbox+live+gold+generatorPDF 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_off0000d8a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f0b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B5 17944 bytes
SHA-256: f3f0e2d9403502ffb1c405a1be07769fca5679ff9291ccb62f0c67b3849d8b97
font_02_sfnt_off00011f25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F25 10540 bytes
SHA-256: f52b1e44f9f7e0b56dbaf9f7f95c0df3b63451f65ac3bd6b28490ea7caf0fd51