Malicious PDF — malware analysis report

Static analysis result for SHA-256 755e6a8662ef2d93…

MALICIOUS

PDF

88.2 KB Created: 2021-09-04 14:25:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 115ae22e8b1e7a1c8a7cb84161da9995 SHA-1: 5c148941846c6101b67d8b9495a9921706451663 SHA-256: 755e6a8662ef2d938886b759ccdc0681f953881ba32be652fee6f9edc8f3a1ec
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links, many of which point to compromised WordPress upload directories, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the nature of the links and the PDF structure align with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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
  • 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 http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff4edae9f0---vatisarakawu.pdf In PDF document text
    • http://ciarajewellery.com/editor_upload/file/mubazubadupufuzevu.pdfIn PDF document text
    • https://9ja-bet.com/userfiles/file/luzemepakeragot.pdfIn PDF document text
    • https://ladymamashop.com/uploads/files/202109031828164666.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16098828d47d07---mijofeb.pdfIn PDF document text
    • http://doudou.tw/userfiles/files/54078724244.pdfIn PDF document text
    • http://stroisvias.ru/userfiles/file/vojowu.pdfIn PDF document text
    • https://ahirealty.in/admin/userfiles/files/20512497044.pdfIn PDF document text
    • https://aukshanya.promosing.com/alpha/ckfinder/userfiles/files/tifujewuvelijeruwipitol.pdfIn PDF document text
    • http://laxycoffee.com/upload/files/leputojeborid.pdfIn PDF document text
    • http://amoy-art.com/Upload/file/tunixevadodomosije.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609f873c5468f---23710162413.pdfIn PDF document text
    • http://andrelandberg.com/userfiles/file/buroledixufumajuwu.pdfIn PDF document text
    • http://hairtransplantmangalore.com/uploaded_files/userfiles/files/39560938409.pdfIn PDF document text
    • http://asfalon.com/__files/file/35587311723.pdfIn PDF document text
    • https://iveducentar.com/uploads/assets/file/55693389263.pdfIn PDF document text
    • http://clubmaniacr.com/campannas/file/gososaperoxuj.pdfIn PDF document text
    • http://myphamasia.net/upload/files/11662502641.pdfIn PDF document text
    • http://funperm.ru/content/file/naluwipeguribase.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/3krp3p3aeirimtirt5189qb5uv/52804377053.pdfIn PDF document text
    • http://clinicoral.com/img/userfiles/files/28186682628.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/160babc25e0bbb---rebuzajanetipese.pdfIn PDF document text
    • http://qianxish.com/ckfind_image/files/mirenulene.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=rosa+luxemburgo+biografia+pdfPDF 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_off0000f15c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF15C 18604 bytes
SHA-256: 0520992517e33df022e5627feebebc741df67bec7952fef32966f300b4b267e9
font_01_sfnt_off000121d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121D3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000139ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139EA 11028 bytes
SHA-256: 80e6bd36ac721f2d898e93b9e087c39c7596bd18ab22efdbf3464388e4780c06

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