Malicious PDF — malware analysis report

Static analysis result for SHA-256 add033d88510d999…

MALICIOUS

PDF

79.5 KB Created: 2021-09-23 22:26:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: eabc205ac1468ac6695f191561ec0631 SHA-1: 64f6d1909cc74d2233c2beef93c7d6b834b9a180 SHA-256: add033d88510d99990890e6871a3d9916d552bb346bd3c2bfcf18fe646fe41d4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. It contains numerous embedded URLs that point to various domains, suggesting it functions as a link farm designed to redirect users to potentially harmful content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicates a malicious intent to distribute links across many domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://crysiq.ru/uplcv?utm_term=b+adjectives+to+describe+a+person PDF link annotation
    • http://ajarnveerapong.com/UserFiles/file/10439142701.pdfIn PDF document text
    • https://vegan-eshop.cz/data/file/48800615417.pdfIn PDF document text
    • http://goksirlambinowice.pl/img/upload/files/sadajubetuwuzuwisupane.pdfIn PDF document text
    • http://hzjksj.com/images/upload/File/segusuvegegi.pdfIn PDF document text
    • http://yameitecl.com/ckfinder/userfiles/files/20210910_124725.pdfIn PDF document text
    • https://homeuu.biz/upload/ckeditor/pages/files/kofaduze.pdfIn PDF document text
    • http://hertzlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/53943627139.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/kfeqcoi0omjan7c4cfsi2s5sgq/waboli.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145610126223---vudozolup.pdfIn PDF document text
    • https://sunnyrosesschool.com/userfiles/file/nexug.pdfIn PDF document text
    • https://happy-playground.gr/uploads/_uploads/files/sijasekosarusopijidibatis.pdfIn PDF document text
    • http://abwmountvernon.com/uploads/files/34021998277.pdfIn PDF document text
    • https://cbdc.co/uploads/ckfinder/userfiles/files/41938343669.pdfIn PDF document text
    • http://opakowania-loga.pl/zdjecia/fotki/file/ponujofiniwojasapoguta.pdfIn PDF document text
    • http://studiorestagno.eu/userfiles/files/wapid.pdfIn PDF document text
    • http://myjobcareer.net/userfiles/file/2021090605483673499.pdfIn PDF document text
    • https://emailing-online.fr/uploads/userfiles/file/22688404912.pdfIn PDF document text
    • http://stefanourso.com/public/userfiles/file/xerafedukafamebaf.pdfIn PDF document text
    • http://csc-vietnam.vn/uploads/userfiles/file/68919233324.pdfIn PDF document text
    • https://stw-nowogard.pl/download/file/95212377215.pdfIn PDF document text
    • http://abnicum.com/files/file/81585012969.pdfIn PDF document text
    • http://tuanayapim.com/rsm/files/bawijiji.pdfIn PDF document text
    • http://mikailang.net/userfiles/file/20210923200049_716132381.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_off0000d358.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD358 16992 bytes
SHA-256: 5e169e9b26fb1dd684e8072cd69d7141cb7eb1474d79602cce02a3de50af676b
font_01_sfnt_off0000ff9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF9D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000117b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117B4 10848 bytes
SHA-256: fc3ae1163be2284e8f8edb212752eb0d02d36350029fede0038db391fde88a6e

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