Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c175e86a62ec708…

MALICIOUS

PDF

80.3 KB Created: 2021-10-22 15:19:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: f6380d21674912fa495e43d052a9bcec SHA-1: 837b2b46bb677fa76bda9a55ddd6b36aef3e70dc SHA-256: 6c175e86a62ec708adb2fd82ba69577a14e3c727f0d72f2721ed323739377835
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was flagged by ML classifiers and ClamAV as malicious, with high confidence. It contains embedded JavaScript, which is often used to execute malicious code or redirect users. The PDF also exhibits characteristics of a link farm, with numerous external URIs pointing to potentially malicious content, suggesting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://soechi.net/userfiles/file/6812232586.pdf In PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615f809a8e88f---95221038120.pdfIn PDF document text
    • http://poetische-malerei.de/web/editor/files/49609800631.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/1e5d20e6b5afa3f59f0a304310bd462c/mexibuxuvifogipuk.pdfIn PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/13801162990.pdfIn PDF document text
    • http://tasteofruraleurope.eu/upload/File/nazesenukanebab.pdfIn PDF document text
    • http://csc-0898.com/userfiles/file/20210928190736_xv0ajz.pdfIn PDF document text
    • http://dallard.fr/ressource/site-image/files/dipapepi.pdfIn PDF document text
    • http://www.gulbaharsigorta.com/contentData/file/11223457597.pdfIn PDF document text
    • https://menlopark.com/wysiwygfiles/file/88000882459.pdfIn PDF document text
    • http://jornalespacoaberto.com/app/webroot/datafiles/editor/files/69788638501.pdfIn PDF document text
    • http://0575zl.com/userfiles/file/62096795981.pdfIn PDF document text
    • http://bioident.pl/photos_fck/file/vozotal.pdfIn PDF document text
    • https://aviatroglo.fr/IMG/file/nokusatizalivet.pdfIn PDF document text
    • http://energyexcess.com/userfiles/file/wusimunexuxukepog.pdfIn PDF document text
    • http://machulski.com/public/file/69823246909.pdfIn PDF document text
    • http://ntouioc.ntou.edu.tw/ckfinder/userfiles/files/faguwemevobokurutadike.pdfIn PDF document text
    • https://rowadalbyt.com/userfiles/files/75073843936.pdfIn PDF document text
    • https://anpheatingandac.net/nbloom/fckuploads/file/zolederujefinoxulikoxege.pdfIn PDF document text
    • http://myshiou.com/uploads/files/202109260212081993.pdfIn PDF document text
    • http://nassagroup.org/app/webroot/js/ckfinder/userfiles/files/jenawunisirogukarubibotu.pdfIn PDF document text
    • http://moscowcharm.com/content/xuploadimages/file/56909844716.pdfIn PDF document text
    • http://beastyenergy.com/userfiles/file/nirunifuxufuxomexavedab.pdfIn PDF document text
    • https://mimpiindahsatu.com/contents/files/83411652830.pdfIn PDF document text
    • http://delta-serwis.pl/pliki/dawuru.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/cmwvf4RlXg4/uplcv?utm_term=did+ghoul+trooper+come+backPDF 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_off0000d378.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD378 17916 bytes
SHA-256: 675a3b91d2808eefb1e4d6139cc0a7ae6ac8ffd06aaf0f73b4bc13e5f5dd6be3
font_01_sfnt_off0001025e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1025E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011a75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A75 11020 bytes
SHA-256: d86397af452113df4e1c00bce096257c9ac6819880bce23abdd06c3e43d1f49f