Malicious PDF — malware analysis report

Static analysis result for SHA-256 61ce03e30fb24158…

MALICIOUS

PDF

67.9 KB Created: 2021-09-12 10:16:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: bf3d9e988e6cd02fd9642bfbfd0a715c SHA-1: f3dab559077878d89239d6e5e89889af7a4b8eb4 SHA-256: 61ce03e30fb24158522bd59137d49943cd5a0fe5dc02b1be4d927cc757a30da9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains a large number of embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content or phishing sites. No scripts were extracted, but the presence of numerous external links is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://philabc.ru/uplcv?utm_term=ka4ka+ru+android+%D0%B8%D0%B3%D1%80%D1%8B PDF link annotation
    • http://studiopedrazzini.eu/userfiles/files/zaliruwidas.pdfIn PDF document text
    • http://parbatsamajjapan.com/img/files/files/89963434605.pdfIn PDF document text
    • http://fotocaroli.it/userfiles/files/susekujuwovaju.pdfIn PDF document text
    • http://lev-steklo.ru/userfiles/file/11551441636.pdfIn PDF document text
    • http://sangsangins.com/upload/upload/file/10909600252.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-9-8/20210908101944888975.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/634d51d46428ae94858a750393e3db5c/26705244377.pdfIn PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/9577699540.pdfIn PDF document text
    • http://www.mamafoundation.cz/ckfinder/userfiles/files/sifuko.pdfIn PDF document text
    • http://webinaris.training/ckfinder/userfiles/publics/files/47329707121.pdfIn PDF document text
    • http://saddabro.com/userfiles/file/67593728529.pdfIn PDF document text
    • https://istanajp.net/contents/files/kemomeb.pdfIn PDF document text
    • http://geasit.it/userfiles/files/51502147876.pdfIn PDF document text
    • http://retroldn.com/userfiles/file/35356862608.pdfIn PDF document text
    • http://chrisnoblelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/86886077771.pdfIn PDF document text
    • http://appli-veolia.net/ckfinder/userfiles/files/83812609836.pdfIn PDF document text
    • http://myappartement.de/web/editor/files/pedoguwixugijelexosofa.pdfIn PDF document text
    • http://www.gulbaharsigorta.com/contentData/file/ravuwapixigurufagubu.pdfIn PDF document text
    • https://istocdukkan.com/userfiles/files/55778891873.pdfIn PDF document text
    • http://xn--b1adrijbbb.xn--p1ai/upload_picture/58398087763.pdfIn PDF document text
    • http://celyroknaterase.sk/editor_uploads/system/files/bebamataforikowovixu.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/161317fe69bc3e---79613627488.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_off0000abdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABDD 14804 bytes
SHA-256: 80d6d6c38cf8b58469ea074ef001acb338e8b000a0e20f228f2a98b9cff67b81
font_01_sfnt_off0000d0b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0B3 10484 bytes
SHA-256: edbca68f29ce843fa7ff0db1c29680fa6998dcae806fe8f31348a589aaa5412f
font_02_sfnt_off0000e87c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE87C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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