Malicious PDF — malware analysis report

Static analysis result for SHA-256 92e90159ba8dfa3b…

MALICIOUS

PDF

77.7 KB Created: 2021-09-15 13:07:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 19440358b1eb79d8396454b1febdc05e SHA-1: 194381f73d7756689d996e6a77d9c3d632d350d0 SHA-256: 92e90159ba8dfa3bad9fd50153b50ad112b582cf26d553a5e94ef170236e1459
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external URIs, suggesting it is designed to redirect users to potentially harmful websites. The presence of JavaScript points to an attempt to exploit PDF vulnerabilities or deliver further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9827

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://seeandhearbetter.ie/img/shop/contents/jolof.pdf In PDF document text
    • http://furnitura-syndicat.ru/ckeditor/ckfinder/core/connector/php/uploads/files/29002704152.pdfIn PDF document text
    • http://h-p-n.fr/catalogue_dynamique/file/suwonumuwadorokasafe.pdfIn PDF document text
    • http://www.corazondelsol.es/ckfinder/userfiles/files/nawopedaguvore.pdfIn PDF document text
    • http://allamericannursing.com/userfiles/file/47641266852.pdfIn PDF document text
    • https://baigiangtoanhoc.com/upload/files/fisopajupuluxi.pdfIn PDF document text
    • https://candbco.com/ckfinder/userfiles/files/77219530355.pdfIn PDF document text
    • https://jotekonybakterium.hu/userfiles/files/34109554862.pdfIn PDF document text
    • http://microsolder.hu/userfiles/files/wemavitefa.pdfIn PDF document text
    • https://ismart99.net/upload/files/zorobenoja.pdfIn PDF document text
    • http://chiengthai.com/file_media/file_image/file/17581271702.pdfIn PDF document text
    • http://tanabuauto.com/js/upload/files/6572062747.pdfIn PDF document text
    • https://www.casestilistas.es/ckfinder/userfiles/files/31704628472.pdfIn PDF document text
    • http://keystoparadise.com/userfiles/files/27521247676.pdfIn PDF document text
    • https://estudiowebcolombia.com/ckfinder/userfiles/files/16645107971.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/73b8b7d16ef5c6e65d3156be6786ed90/jutenijupufebox.pdfIn PDF document text
    • http://debseven.net/UserFiles/File/30045234498.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/16132fe3180f79---46578754961.pdfIn PDF document text
    • http://vakantie-noordlimburg.nl/ckfinder/userfiles/files/lulozuzudij.pdfIn PDF document text
    • http://wolfroccatiassociati.it/userfiles/files/dosuzowixovoxaso.pdfIn PDF document text
    • https://saintarseny.ca/sites/saintarseny.ca/files/file/32817581513.pdfIn PDF document text
    • http://intertribo.sk/files/4808995824.pdfIn PDF document text
    • http://kagoshimakojintaxi.com/userfiles/file/vuvumarizajopen.pdfIn PDF document text
    • http://dbcasagayathottam.org/assets/uploads/cms_images/files/27297651320.pdfIn PDF document text
    • https://kisikana.hr/userfiles/file/xotifokoremeniso.pdfIn PDF document text
    • http://hotstamping.pl/files/file/xomigevipopala.pdfIn PDF document text
    • http://iccarrentals.com/files/file/sagabekunufulo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=the+walking+dead+apk+data+downloadPDF 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_off0000cb6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB6A 17612 bytes
SHA-256: 56987d88aab5260161efd0748f0c37dd5cd1036ccfbfc637be9681d64a1768c9
font_01_sfnt_off0000f936.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF936 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001114d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1114D 10544 bytes
SHA-256: ce58d08799730ec47bc455b3a691418d7c695620d8ad9f69a32ee27f249e5c43