Malicious PDF — malware analysis report

Static analysis result for SHA-256 e961143ac2b6b7c0…

MALICIOUS

PDF

97.1 KB Created: 2021-09-19 23:57:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 148e2d7454e45be8ba0978b14979de12 SHA-1: 41a445f3e4aa96cf75ad0d0c4d44833faf5e1707 SHA-256: e961143ac2b6b7c0a2cbba2d2abd613a5f349c6749111e5d94e9956e0cf9d726
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to potentially malicious or phishing sites, suggesting a redirection attack. The PDF structure and embedded links are consistent with a phishing lure or a downloader for further malicious content.

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://synerhu.ru/uplcv?utm_term=justice+league+snyder+cut+online+subtitrat PDF link annotation
    • https://etcbt.com/userfiles/file/venenegidurezemo.pdfIn PDF document text
    • http://wahluenfty.com/userfiles/tamerovitamowozapuf.pdfIn PDF document text
    • http://www.valathors.com/ckfinder/userfiles/files/9666288260.pdfIn PDF document text
    • http://opuspointpartner.com/ckfinder/userfiles/files/jizumapawinopoteradurig.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fcab8625a8---gemafunenuzetamita.pdfIn PDF document text
    • http://htygroup.com/upload/files/musigiposawikep.pdfIn PDF document text
    • http://damnoen.com/ckfinder/pho/files/72813550266.pdfIn PDF document text
    • http://ruishikaishi.com/upload/content/files/2021/09/20210909065536.pdfIn PDF document text
    • http://grancanariacomercio.com/documentos/file/laxiruzufumilu.pdfIn PDF document text
    • http://gibkrakow.pl/uploads/files/vajekadepuxufub.pdfIn PDF document text
    • http://sewakendragroup.com/userfiles/file/67215602429.pdfIn PDF document text
    • http://rsti.biz/files/fck/file/werumanepimomakek.pdfIn PDF document text
    • http://belniig.by/public/file/88966179952.pdfIn PDF document text
    • https://eownauto.com/uploadpic/files/94614857285.pdfIn PDF document text
    • https://perfecthospitals.org/ckfinder/userfiles/files/bomifidulodalu.pdfIn PDF document text
    • http://fujiya-burbank.com/uploads/files/fixunexemi.pdfIn PDF document text
    • https://datatalk.ilvzhou.com/upload/files/2021/09/202109040849204240.pdfIn PDF document text
    • http://ipayon.com/root/FCKeditor/file/ridubesamidugusojapigixen.pdfIn PDF document text
    • https://relans-nn.ru/images/docs/file/wotog.pdfIn PDF document text
    • https://mariapolis.net/ckfinder/userfiles/files/gozaje.pdfIn PDF document text
    • http://xn----7sbjvweekof5d.xn--p1ai/files/files/gajuxogixoveronupot.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/66556420179.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_off00010b4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B4B 22576 bytes
SHA-256: 78ce241bec0152f7856a1474d21e16f26c8d9f76bedc95216b3cbcac5abf4500
font_01_sfnt_off00014560.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14560 10892 bytes
SHA-256: ce95f9fdda733f7c95b07f1728a8aee5d7a5693eb3d57b8483ac8fe38aef05cf
font_02_sfnt_off00015e92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E92 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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