Malicious PDF — malware analysis report

Static analysis result for SHA-256 ced7ac9cd0881267…

MALICIOUS

PDF

75.4 KB Created: 2021-09-18 21:12:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c9ad93ba9446c0747f523ecb06bcec8c SHA-1: 90d7f9d0f0693c238b73e3affae1de6568954b6b SHA-256: ced7ac9cd08812677a90b08b8d00ab4096016b6fa0fd6e8b7e5c629be237da18
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous embedded URLs, many pointing to disposable domains or IP addresses, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure strongly suggest an attempt to deliver a secondary payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://crewmak.ru/uplcv?utm_term=happy+mod+dream+league+soccer+2019 PDF link annotation
    • http://jj-metals.com/userfiles/file/2021091214480373499.pdfIn PDF document text
    • https://tootooair.com/FileData/ckfinder/files/20210912_4C7D4012DDAC28CD.pdfIn PDF document text
    • http://koslita.eu/ckfinder/userfiles/files/91784852389.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/e33a45741fbc7b918c34d93287fe426f/98966073833.pdfIn PDF document text
    • http://secohthailand.com/file_media/file_image/file/sosaxoguraleku.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613995e54304a---sigoligikolokujinab.pdfPDF link annotation
    • http://tcsklife.com/filespath/files/20210909050259.pdfIn PDF document text
    • http://www.cenlajobinator.com/siteuploads/editorimg/file/bogilobegokufunuratu.pdfIn PDF document text
    • http://votava2.altrodesign.eu/ckfinder/userfiles/files/62063420265.pdfIn PDF document text
    • http://www.tvmreza.tv/ckfinder/userfiles/files/zotijavazafanejor.pdfIn PDF document text
    • http://okfilm.kr/userData/board/file/14715987906.pdfIn PDF document text
    • http://koryosushi.com/uploads/files/11358928543.pdfIn PDF document text
    • http://bn-biz.com/userData/board/file/kemejavurifutepinaka.pdfIn PDF document text
    • http://hfnhsw.com/upload/files/juzejegimugu.pdfIn PDF document text
    • http://scouttautomotive.com/editor_uploads/system/files/30710944037.pdfIn PDF document text
    • https://congnghieptauthuyvietnam.vn/upload/files/zapajerenujezafoke.pdfIn PDF document text
    • http://shengyaweb.com/uploadfile/file/2021091019150273.pdfIn PDF document text
    • https://cytokin.ca/upload/editor/file/82825179847.pdfIn PDF document text
    • http://dailycan.com/userfiles/files/46009460771.pdfIn PDF document text
    • http://cnwt.mgo.cool/upfile/files/2021/09/02/76452242946.pdfIn PDF document text
    • http://back2wood.de/userfiles/file/61161146187.pdfIn PDF document text
    • http://millecolori.it/images/file/34313000855.pdfIn PDF document text
    • https://drbumbnursinghome.in/ckfinder/userfiles/files/kisob.pdfIn PDF document text
    • http://1qjd.com/upload/files/2021-09-02-10-34-46-mk94fbBE.pdfIn PDF document text
    • http://yournamebadges.com/withyourdog/cms_uploads/file/95860532547.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_off0000c422.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC422 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dc39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC39 11232 bytes
SHA-256: 211a4bd68e666d7c1808f291738f9dc9380d6a61bcee9ab4104bcf4ba7d62674
font_02_sfnt_off0000f66d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF66D 16100 bytes
SHA-256: ef8b28ccc765302e4da0a28e83bc0a58376182eec35629061dc7efbb4290ad39