Malicious PDF — malware analysis report

Static analysis result for SHA-256 802753afb6cc4750…

MALICIOUS

PDF

90.9 KB Created: 2021-09-17 03:45:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c056cdda9883a78c351cbf75868a4ea3 SHA-1: 3987d5ad97c61d78717c60d7c8c546c28ead587c SHA-256: 802753afb6cc4750ebae3e0c3f8fe7a45d6ea4bc604a25c6317f4d6e737c96d0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file functions as a link farm, directing users to various external websites. Several of these URLs point to compromised CMS upload directories, suggesting an attempt to lure victims to potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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 https://larioenergy.net/uploads/file/lufowibuxijoxelofazemub.pdf In PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fb62176346---tizegofoguxoladopoloz.pdfIn PDF document text
    • https://forexinc.ca/upload/editor/file/99231596582.pdfIn PDF document text
    • http://www.heatandgas.com/EditorImages/file/73390078313.pdfIn PDF document text
    • https://supportsystemsvainc.com/home/ssvi/public_html/ckfinder/userfiles/files/fesirujaruwakapoloko.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613fb1160c3f3---32626577399.pdfIn PDF document text
    • http://knipia.com/userfiles/file/xafajomen.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/16143e08e5821a---61834539010.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/v7pouhgu2h2b42l91iv5ash1eo/30847550710.pdfIn PDF document text
    • http://anquocrealty.com/uploads/image/files/gujefemezigo.pdfIn PDF document text
    • http://scard.vn/app/webroot/uploads/files/32026308171.pdfIn PDF document text
    • http://markaoyun.com/calisma2/files/uploads/xenezijisoxuvipevezijob.pdfIn PDF document text
    • http://mvsexpo.ru/admin/ckfinder/userfiles/files/34578638522.pdfIn PDF document text
    • http://nissanotogovap.com/uploads/images/files/48429098540.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16135c4d3ef6a6---88852856888.pdfIn PDF document text
    • http://wrtour.com/FileData/ckfinder/files/20210916_37B20AD3C95C7AA8.pdfIn PDF document text
    • https://atarentacarburdur.com/userfiles/file/18556776550.pdfIn PDF document text
    • http://mkngsp.ru/upload/files/82944927787.pdfIn PDF document text
    • http://dentalcenterstudio.it/userfiles/files/64714085877.pdfIn PDF document text
    • http://kdwatch.net/upload/files/2021090907361050.pdfIn PDF document text
    • http://istanbulballoons.com/ckfinder/userfiles/files/99951135707.pdfIn PDF document text
    • https://navoloki.mebel18.com/uploads/files/75307547824.pdfIn PDF document text
    • https://atlantidegattico.it/file/97602097901.pdfIn PDF document text
    • https://www.artikel238.nl/emmwebbit/resources/ckfinder/userfiles/files/8854436657.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=how+to+take+hd+screenshots+androidPDF 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_off0000f983.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF983 10592 bytes
SHA-256: 9a477e0521d49ecbef85ffefbb151830505817090977bbb15f6f2972c00a19f0
font_01_sfnt_off000111b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111B4 19820 bytes
SHA-256: 83f6661a7b236d6a534b17b2065e39e611949b23a58fc345a444cb063d369d66
font_02_sfnt_off0001455e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1455E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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