Malicious PDF — malware analysis report

Static analysis result for SHA-256 11d2ebcde9083c74…

MALICIOUS

PDF

62.3 KB Created: 2021-09-26 11:25:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 3fc2d3d1dc943f5f3d6f624a9e105a34 SHA-1: e04e904f3ee52dfd5a7da5d02849e6ed934c3018 SHA-256: 11d2ebcde9083c743ab97a013e49e49112961bff1cd15ea42cf254e53bea229b
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and exhibits characteristics of a link farm, with numerous external URIs pointing to potentially malicious domains. The presence of embedded URLs suggests an attempt to redirect the user to external sites, likely for phishing or to download further malicious content. The PDF structure and embedded links are consistent with a phishing lure.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2574

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://chcial.ru/uplcv?utm_term=mod+menu+cod+mobile+ios PDF link annotation
    • https://pcparts.fr/ckfinder/userfiles/files/90329872607.pdfIn PDF document text
    • http://onyx-innovations.com/assets/ckfinder/userfiles/files/34608495337.pdfIn PDF document text
    • http://dinskayarealty.ru/media/file/jenes.pdfIn PDF document text
    • http://wsp.pl/userfiles/file/98811364957.pdfIn PDF document text
    • http://dongtienlamnghiep.com/upload/file/64952765096.pdfIn PDF document text
    • https://sibiucuratenie.ro/fckeditor/userfiles/file/xomatozipavofunot.pdfIn PDF document text
    • http://greentreeprep.com/cote_dor_import/admin/ckfinder/userfiles/files/20633838390.pdfIn PDF document text
    • https://nothingbutsafetyglasses.com/userfiles/file/kelakawe.pdfIn PDF document text
    • http://jerseybankruptcylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nifevem.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/mesetulexomil.pdfIn PDF document text
    • http://a1-automotivegroup.com/upload/files/menemuvobopovukedadel.pdfIn PDF document text
    • http://stellarp.com/userfiles/files/jonetafaxagu.pdfIn PDF document text
    • http://adveotec.com/img/file/xuvetusagadusi.pdfIn PDF document text
    • http://businessplan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/dobugevovotulaveduzew.pdfIn PDF document text
    • http://olympusflights.com/files/files/78848859164.pdfIn PDF document text
    • http://nhakhoasaigonkimcuong.com/uploads/images/files/mojurukuge.pdfIn PDF document text
    • https://wonwon.taipei/photo/file/67981619586.pdfIn PDF document text
    • http://tsradviseurs.nl/mailing/images/photo/file/senedinewinozis.pdfIn PDF document text
    • https://cdmsig.com/ckfinder/userfiles/files/69184891033.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161448a4097463---givibumegipoxixugu.pdfIn PDF document text
    • http://ilink.pl/userfiles/file/nuvevorexuwibuxisopezujo.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/4mrh1ctdeqqlgr1s83li9u8huo/70531835469.pdfIn PDF document text
    • http://tcsklife.com/filespath/files/20210925164843.pdfIn PDF document text
    • https://ferado.vn/userfiles/file/61263189352.pdfIn PDF document text
    • http://www.deewanalarab.com/up_imgs/pibotetewevoxigepow.pdfIn PDF document text
    • http://tnshoppingbag.com/upfiles/file/60656838773.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_off0000b9cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9CC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d1e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1E3 10404 bytes
SHA-256: 5b836cf65bd04c4094cbc72f6dbf56d5775cab77def5b22a03c8b153dde4f3e4