Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd6eac3b88b97096…

MALICIOUS

PDF

69.7 KB Created: 2021-09-25 14:49:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 54dd6df720612b6949a410ea75fee21a SHA-1: 3ce692a405d65cf7cb86c2646c58d36489ee377e SHA-256: cd6eac3b88b9709680018a56fe89083b94983e1a737079e64b846b45a4394cdf
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a high number of external URIs, many of which are hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is likely used to obfuscate the links or perform malicious actions upon opening.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://oniceh.ru/uplcv?utm_term=let+him+go+full+movie+download PDF link annotation
    • http://rem-proekt.com/f/file/3055360602.pdfIn PDF document text
    • https://festacontinua.it/public/file/xulebijomolejasopopil.pdfIn PDF document text
    • http://stepasidemedical.com/images/uploads/file/72444676543.pdfIn PDF document text
    • http://3dtechgroup.com/uploads/image/files/96187561962.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/8700d512a4d720b98b61c239b1f44e6d/99252308010.pdfIn PDF document text
    • http://tsrmmessina.it/userfiles/files/61774697402.pdfIn PDF document text
    • https://melnikhouse.com/userfiles/file/zopawafakuvu.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614daeaaa0498---34633787896.pdfIn PDF document text
    • http://eternoohydro.com/d/files/11707812101.pdfIn PDF document text
    • http://fzcce.com/aimgs/uload/files/forojixesewazuxara.pdfIn PDF document text
    • http://zaiger.ru/img/file/99262745040.pdfIn PDF document text
    • http://dienvietbac.com/uploads/files/xudevabojonunurujerapelax.pdfIn PDF document text
    • http://www.leads-bd.org/app/webroot/js/ckfinder/userfiles/files/76391001168.pdfIn PDF document text
    • http://natur-pet.cz/webpagebuilder/ckfinder/userfiles/files/mojixugivu.pdfIn PDF document text
    • http://ceraunavoltapizzeria.it/userfiles/files/23721575201.pdfIn PDF document text
    • http://bachtungcompany.com/upload/files/60222238897.pdfIn PDF document text
    • http://jump360.co/upload/files/20210916214827.pdfIn PDF document text
    • http://fjzy18.com/image/uload/files/penoxawewomazogo.pdfIn PDF document text
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/83143418024.pdfIn PDF document text
    • https://meesens.be/KrMee/Tekstverwerker/fekafif.pdfIn PDF document text
    • http://energy-labels.com/userfiles/file/16397464465.pdfIn PDF document text
    • http://eko-gospodarstwo.eu/files/file/21983375239.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_off0000ad26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD26 16580 bytes
SHA-256: e162ece7e41bace2bc09ac1b7267139d236419dbcb0708a21b1f3c49f72db8fa
font_01_sfnt_off0000d755.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD755 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ef6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF6C 10744 bytes
SHA-256: 7b1983f663b7f7d59fafebf471e8d6f3425fc7b6404af5037289306aebebc9f2

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