Malicious PDF — malware analysis report

Static analysis result for SHA-256 ded54ef91786bb79…

MALICIOUS

PDF

84.6 KB Created: 2021-10-07 17:45:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 82cb463e4d5a33a11ce7145c88307909 SHA-1: 593efd88338d943cf1c5ee596f57c9e3901c1138 SHA-256: ded54ef91786bb79c0c0bae1876664530f824cf9df04a647dfd59b49b08b7434
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains a large number of embedded URLs, many of which are designed to redirect users to potentially malicious or phishing sites, as evidenced by the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic. The presence of UTM parameters in some URLs suggests tracking or phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://wastran.ru/uplcv?utm_term=current+ministers+of+pakistan+pdf PDF link annotation
    • http://agriturismolionsfarm.it/userfiles/files/64449366166.pdfIn PDF document text
    • http://electriccityusa.com/images/fck_uploads/file/22569573981.pdfIn PDF document text
    • http://www.cddfct.com/up_files/file/gisuzofevogok.pdfIn PDF document text
    • http://bulk-supplies.com/userfiles/file/38359121358.pdfIn PDF document text
    • http://www.ruben.pl/ckfinder/userfiles/files/39091967613.pdfIn PDF document text
    • http://stellar.ru/ckfinder/userfiles/files/pewevupavubaxowipezoxo.pdfIn PDF document text
    • https://korzo-galeria.hu/files/file/32085339334.pdfIn PDF document text
    • http://craftland.de/res/wysiwyg/file/79109563493.pdfIn PDF document text
    • http://debten.net/UserFiles/File/24630710013.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1615be6b207718---94993832190.pdfIn PDF document text
    • https://megalight.lv/uploads/files/125156758.pdfIn PDF document text
    • http://geomanteia.com/userfiles/files/merupedunowesiveped.pdfIn PDF document text
    • https://pfhotel.gr/ckfinder/userfiles/files/26240761894.pdfIn PDF document text
    • http://tahokart.ru/userfiles/file/7815263181.pdfIn PDF document text
    • http://worldtile.net/jangheung/userfiles/file/veziviwebimilum.pdfIn PDF document text
    • http://maekuangudomthara.com/ckfinder/userfiles/files/medutifajerogelowo.pdfIn PDF document text
    • https://sieuviet.net/webroot/img/files/91913433318.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/1615e0fa757359---52686402245.pdfIn PDF document text
    • https://totalmediasolutions.ae/ckfinder/userfiles/files/tajifugu.pdfIn PDF document text
    • http://usa-ex.com/images/blog/file/10513650152.pdfIn PDF document text
    • http://danangsculpture.com/uploads/image/files/93802280165.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_off0000e3b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B3 18804 bytes
SHA-256: a3b72b4e68f61ab72ad2fd9c4835c0de7d5d24b23ce012108516e8d2b43732ae
font_01_sfnt_off00011411.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11411 10836 bytes
SHA-256: f3642fb131c3178ca4c44a9883b057a4666ff79ebc8ddb7b0b2c091dca25e305
font_02_sfnt_off00012d1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D1C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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