Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1cd0e906ed3bfdf…

MALICIOUS

PDF

82.0 KB Created: 2021-09-14 08:37:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: b7013cb7b171657c1d4ed32f03730cab SHA-1: 2db1b70d439e9e81bc87fc9946b399e26fada1ed SHA-256: e1cd0e906ed3bfdf382c5a0324aa67afc316714072da74230a514e1bad902a33
124 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV with a 'Pdf.Phishing.Trojan' signature. Static analysis reveals it functions as a link farm, directing users to multiple external websites, some hosted on potentially compromised CMS platforms. The presence of numerous links, including one pointing to ambiance-cinema.fr, suggests an attempt to distribute malicious content or phish for credentials.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4272

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://steammining.com/userfiles/file/43485997268.pdf In PDF document text
    • http://cyc.cz/pictures/clanky/files/98446706155.pdfIn PDF document text
    • http://dkyangmei.com/uploadfile/file/2021090517530973499.pdfIn PDF document text
    • http://odontoflash.eu/userfiles/files/1748220033.pdfIn PDF document text
    • http://aybar-gallery.com/userfiles/files/jurewazazufap.pdfIn PDF document text
    • http://xn--ob0bjxt9h99icicrvkksa421cwwp7hiv4d6a.com/ckfinder/userfiles/files/36766251709.pdfIn PDF document text
    • http://titadoorbinhduong.com/upload/files/rudewivatinejitixi.pdfIn PDF document text
    • http://zamaro.cz/images/fcke_files/file/4369732025.pdfIn PDF document text
    • http://titadoorbinhduong.com/upload/files/69988762798.pdfIn PDF document text
    • http://auto-rad.pl/userfiles/file/77043347144.pdfIn PDF document text
    • https://griby.biz/ckfinder/userfiles/files/sunok.pdfIn PDF document text
    • https://matkinhantai.com/luutru/files/saxoleketetasa.pdfIn PDF document text
    • http://davidhammerstein.org/ckfinder/userfiles/files/96584636117.pdfIn PDF document text
    • https://esofagopisa.it/userfiles/file/63922076522.pdfIn PDF document text
    • http://snnet.kr/board_pds/fckeditor/2021/09/file/46192416870.pdfIn PDF document text
    • https://gkscam.com/userfiles/file/jeduzeveg.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/6b5126b267e3e5f61bab4268e14c316c/kinamewo.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/f4d75697f6e4827b4ea8e5eb558b7cd1/4978311484.pdfIn PDF document text
    • https://lolakarimova.uz/ckfinder/userfiles/files/73466183023.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1613d75ac2783a---68954325618.pdfIn PDF document text
    • https://psfund.org/public/uploads/files/cms_files/navususekajorawuxakoz.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613afc16ef20f---kepuwosejizaz.pdfIn PDF document text
    • http://ambiance-cinema.fr/wp-content/plugins/super-forms/uploads/php/files/88ca13bc2ebe10cdd65dacea80be06af/vexetep.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=dragon+ball+super+broly+full+movie+eng+dubPDF link annotation
    • 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_off0000e772.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE772 11164 bytes
SHA-256: 9938aa4d0f8e8f133e1241bbb9e2716b94eda9ec25b6fbc8c1b3c7af4e752193
font_01_sfnt_off00010116.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10116 19340 bytes
SHA-256: a8c94a14c414e3fd1ab99b780e5a255622b43fb40865e410247f4d4fd9505271
font_02_sfnt_off00013446.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13446 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1