Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ee7fd1aba64ef98…

MALICIOUS

PDF

62.5 KB Created: 2021-09-06 07:52:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0e99ccf357ba5049b4036a1319783f50 SHA-1: 6c5ad256bd91f69be87c55039adead2c9502c265 SHA-256: 0ee7fd1aba64ef9819753a4c0a9ead359ec4483232ef130271f8a34a9dfca016
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by ClamAV as 'Pdf.Phishing.Trojan'. Heuristics indicate it functions as a link farm, directing users to multiple external URLs, some hosted on compromised CMS uploads. The ML classifier also flagged it as malicious. The PDF contains embedded URLs that likely serve as lures to phishing or malware download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5233

Heuristics 5

  • 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
  • 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://madopin.com/calisma2/files/uploads/ferafetoxixunaguz.pdf In PDF document text
    • http://alexanderkanevskyartgallery.com/clientMedia/file/vuwesa.pdfIn PDF document text
    • http://erulingua.hu/uploads/content_files/files/39285724003.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/ed571e7c9b1408ebbe9653953f62752d/xuzed.pdfIn PDF document text
    • http://gorisum.net/fckeditor/upload_file/file/35116594917.pdfIn PDF document text
    • http://htwy.com/upload/file/levedi.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606d537917edb---91452959574.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa7b719ad48---pefovuzud.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/71a1aaabff05a6e35d7a794053d9f667/jodulavini.pdfIn PDF document text
    • http://studiophotosfashion.it/userfiles/files/nujibikarag.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1ccf4347d---86878754498.pdfIn PDF document text
    • http://veterinariacasettamattei.it/userfiles/files/13419493900.pdfIn PDF document text
    • http://griby.biz/ckfinder/userfiles/files/71151105203.pdfIn PDF document text
    • http://andreaslasnik.com/data/files/jodedizevi.pdfIn PDF document text
    • http://ufcnagykanizsa.hu/userfiles/file/lilijaser.pdfIn PDF document text
    • https://autoprofi.ua/userfiles/file/48652732051.pdfIn PDF document text
    • http://xn--42c1dhzaq5aeb.com/userfiles/files/jazaru.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/16129fecc09088---wazezegudiwuxaxogegonizet.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/5c1bf8714138caa05578481245849c58/kajolonezexa.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1608397f014fb1---45098727440.pdfIn PDF document text
    • http://idcla.net/upload/files/2253365376.pdfIn PDF document text
    • https://rusepress.com/uploads/wysiwyg/files/2495963231.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=google+doc+to+pdf+ipadPDF link annotation
    • 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_off0000b4d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4D8 10464 bytes
SHA-256: e28c61ba81f5239580b7ccaff9bff8ccf714745b939b37eddbedcfd552389562
font_01_sfnt_off0000cc8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC8D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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