Malicious PDF — malware analysis report

Static analysis result for SHA-256 286b95722b19dd16…

MALICIOUS

PDF

73.7 KB Created: 2021-09-07 06:06:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 8d0aa0a3ab2b27e81b6bd1a5e49d6165 SHA-1: 8a11d6682d412602056e197365b2c69c472714e6 SHA-256: 286b95722b19dd1680ee66f441a08465c0a6c10e9b7bddb26f0743304368adec
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a malicious intent, likely phishing or malware delivery through these links. The file's structure and the nature of the URLs align with common tactics for distributing malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4750

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
  • 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
  • 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://coretry.ru/uplcv?utm_term=20+prinsip+ikhwanul+muslimin+pdf PDF link annotation
    • http://cec-intl.ru/app/webroot/files/file/gadiramobuxe.pdfIn PDF document text
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/f30e9f61925d9ae8486e4317a020b3e6/raserarozeramukerewowemes.pdfIn PDF document text
    • http://thuduchouse.vn/pics/file/3545378505.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a1baf8d712---85212391593.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/9lic9o261j8k2as4i2delcllu2/32244060882.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/851bdfb11f844d6f882693b7ba9b5d8d/7864272088.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096ea8a4a82a---gosajipimamatagutu.pdfIn PDF document text
    • https://abe-rdc.com/userfiles/file/kobesuramefavagoku.pdfIn PDF document text
    • http://ytbozhuo.com/upload/file/062323443764.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16080b0240be77---84788001331.pdfIn PDF document text
    • https://listapp.in/ci/userfiles/files/15367654102.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad8d0dc79d4---serofuxavo.pdfIn PDF document text
    • http://cooper1972.com/clients/b/b4/b451ebb09e7e0345645526f893d9a49e/File/57432128016.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/2a69411f1bab53b35fde3f33c8444db6/20095674589.pdfIn PDF document text
    • http://townofwinslowin.com/flash/townofwinslowin.com/file/7784905757.pdfIn PDF document text
    • http://keacg.com/upload/files/76038480311.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/47371520018.pdfIn PDF document text
    • https://abhimaninteriors.com/ckfinder/userfiles/files/nivuf.pdfIn PDF document text
    • http://hadt.vn/upload/files/39258624276.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/9ad6b55bfcb2c80f507d53aa6df95e61/57774091417.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/f475f8465f5b412276cd07355a7d26d4/jewexasiba.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b5978980ef7---jiwusuzibosimevesanepuv.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/nu87iso93kh2nihj52hd7j5h64/toderututubokaburudova.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dff9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f810.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF810 10836 bytes
SHA-256: 4df79a02c56c633580ff7454d2ba54f8c143e946d3e8b500f7b6178123aacd98