Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc84be02cd20b6ba…

MALICIOUS

PDF

100.9 KB Created: 2021-07-20 03:44:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7062c01aea3fd89e6ef6cb4f9e46e8d4 SHA-1: e2b63d1a6f477f8d7236b94618f95ad6e722af9f SHA-256: cc84be02cd20b6baaef924b93abe003ca906187f3da9a1ac1e0538788945fc89
156 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. The PDF contains numerous links pointing to compromised CMS uploads and disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and link farm heuristics strongly suggest it's part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/850f16e8eaa6b5e8b212627216005ad9/2196262024.pdf In PDF document text
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/2lhb8lfhcuv276satestnmejc0/fepuri.pdfIn PDF document text
    • http://mynigaoe.com/upload/file/20210611193604.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a270f36226f---xowidipasegoxofojuz.pdfIn PDF document text
    • http://soupworld.de/upload/file/sujutiregudajufijulebi.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609011b216001---xudun.pdfIn PDF document text
    • http://phuwangnam.com/user_file/file/zizokajinizirokedofuk.pdfIn PDF document text
    • https://dermatologie-francophone.com/userfiles/file/gewate.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160f438f2ba392---42686567209.pdfIn PDF document text
    • http://gapoom.com/upload/fckeditor/file/zexule.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/1607755ace7203---91431412572.pdfIn PDF document text
    • http://ranagro.com/files/79264162156.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080231680800---zupamujafu.pdfIn PDF document text
    • http://agendatourvietnam.com/hinhanh/file/78418205991.pdfIn PDF document text
    • http://daugiavanthienphuoc.com/media/ftp/file/runinelunemogobirerorej.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba79e2ba22e---94774550054.pdfIn PDF document text
    • http://benardoutlite.com/admin/fckeditor/fckdata/file/91275379620.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/78088833220.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160983885b5ab2---50079396709.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/d4e6b7853952e7603fc4979d9509c13a/gimop.pdfIn PDF document text
    • https://menu2uplus.com/images/file/99920834827.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1e0cb7de7b---22197501632.pdfIn PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a2490c54b10---giwitolozomusodetus.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/9e7dae719bba1ba53bf1ffde77f0b4ae/xekegukowizobak.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=the+firstborn+of+all+creationPDF link annotation
    • 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_off00012917.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12917 10536 bytes
SHA-256: b9dc0e2c48055ff4e75bd4ef173afddc9ba17a7c61c581f9ff0da664552b3f69
font_01_sfnt_off0001410c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1410C 17268 bytes
SHA-256: 97123ddba1e7751da5b970fc6ed04bd154d78908ad1737d397cae0341f840c6b
font_02_sfnt_off00016e28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E28 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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