Malicious PDF — malware analysis report

Static analysis result for SHA-256 76eb80bbf49a4020…

MALICIOUS

PDF

72.4 KB Created: 2021-09-19 02:45:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 43b76590767482166033ac517087e59c SHA-1: eab14d31ad157b30c2c40fb09d8367d3a0d9b945 SHA-256: 76eb80bbf49a4020f44e18ad2bb0499d0d61f1be32beef3fcf57f7da9370abc4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs pointing to disposable hosting, suggesting a link farm or phishing lure. The presence of external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly indicate that the document's primary purpose is to redirect users to malicious websites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://coretry.ru/uplcv?utm_term=lord+of+shadows+pdf+english PDF link annotation
    • http://egyptlance.com/userfiles/file/40965193335.pdfIn PDF document text
    • http://dzstock.com/Upfiles/file/zizukadunigokuraj.pdfIn PDF document text
    • http://kiiga.ru/userfiles/file/ravijegonuvibofi.pdfIn PDF document text
    • http://geoscan.it/userfiles/files/29022353461.pdfIn PDF document text
    • http://sicilalluminio.it/userfiles/files/senirowizulovoveveb.pdfIn PDF document text
    • http://lamelove-zakryti.cz/userfiles/file/87727613083.pdfIn PDF document text
    • http://kochamsushi.pl/UserFiles/file/94640647733.pdfIn PDF document text
    • http://letsbelegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/rolisitofimofutifi.pdfIn PDF document text
    • http://dxczx.com/ckfinder/userfiles/files/20210912_014914.pdfIn PDF document text
    • https://silverstonedevelopments.com/ckfinder/userfiles/files/46756150721.pdfIn PDF document text
    • http://ceramvetro.net/userfiles/file/puxoxevi.pdfIn PDF document text
    • http://wpscrm.in/uploaded_files/userfiles/files/60519353882.pdfIn PDF document text
    • http://maychebiengoduykhuong.com/media/ftp/file/vumonuxujageximaneb.pdfIn PDF document text
    • https://mfdesign.hu/files/file/36360829304.pdfIn PDF document text
    • http://imaginove.eu/data/Files/xekodaxunufokov.pdfIn PDF document text
    • https://sdudyogtechnologies.in/ckfinder/userfiles/files/43581030620.pdfIn PDF document text
    • https://kristinanamaste.eu/files/59719162002.pdfIn PDF document text
    • http://easternhoteljeju.com/FileData/ckfinder/files/20210914_040A5FBBA84D9DFC.pdfIn PDF document text
    • http://wsm.hk/images/uploadfiles/file/witodoliridunamenum.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/bb1c780789fe96d551b813260a9668b9/72298267799.pdfIn PDF document text
    • https://pui-vital.ro/msg_media/file/bekibobukotuxinazajesexo.pdfIn PDF document text
    • http://www.saveurspoitoucharentes.com/admin/ckfinder/userfiles/files/kawidakinowoguve.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_off0000b89b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB89B 10720 bytes
SHA-256: 19ad31a88f136c33eaa521bb3cd4452705373b83d996120da6cd514334c26005
font_01_sfnt_off0000d0f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0F8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e90a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE90A 16828 bytes
SHA-256: c0792095bf148c7e8cbf0030409e646710463a38c13df5e45bf0102707a50ce3

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