Malicious PDF — malware analysis report

Static analysis result for SHA-256 47f805bf1d5df1ef…

MALICIOUS

PDF

79.0 KB Created: 2021-09-20 09:43:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: d27b8e9b576063fd8a2aa4288d7d15ad SHA-1: c2358f8a7c514e5110a9b033f7d673b73667e109 SHA-256: 47f805bf1d5df1ef5e4173c53d65b0bdb06dec7532477b97c4f5e20b1da93f85
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a link farm designed for phishing. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the structure and URL patterns are consistent with a phishing campaign aiming to deliver further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6220

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://chcial.ru/uplcv?utm_term=pre+fertilization+structure+and+events+in+flowering+plants PDF link annotation
    • https://uslugiinzynierskie.com/eurostyl/photos/file/zozujaxofef.pdfIn PDF document text
    • http://garderoba.sk/images/_file/wonumadoxofafizotatebafa.pdfIn PDF document text
    • http://www.itidharamshala.in/images/uploads/files/fubesazilo.pdfIn PDF document text
    • http://zezoalza.com/ckupload/files/7663392549.pdfIn PDF document text
    • http://cck-brno.cz/ckfinder/userfiles/files/faxoxegaxiguz.pdfIn PDF document text
    • https://lochoanggia.com/upload/files/60769467779.pdfIn PDF document text
    • http://szjglaw.com/uploadfile/file/2021091805071173499.pdfIn PDF document text
    • http://bobmeetin.com/media/galleries/files/2350207033.pdfIn PDF document text
    • http://russia-ex.com/images/blog/file/wumazedo.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613f1b3168620---41375204593.pdfIn PDF document text
    • http://delannahotel.com/user_img/file/nizasaladu.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/c981f7901f31b2a3abb132fe0381a5af/67720605478.pdfIn PDF document text
    • http://omnoiptv.com/outscapes/admin/ckeditor/uploads/ck/files/18548895091.pdfIn PDF document text
    • http://gruppocreta.com/userfiles/files/29798242150.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/16132030ba134c---zipanikojedoto.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1613930e5b0cc3---xafatesikunuburovizezuno.pdfIn PDF document text
    • http://e2ingenieros.com/ckfinder/userfiles/files/89315403886.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/cntmt978dfsp9hb0fr4kp7seio/88660567417.pdfIn PDF document text
    • http://kasargod.net/uploads/file/tazewabiro.pdfIn PDF document text
    • http://theclubburger.com/uploads/files/41273072523.pdfIn PDF document text
    • http://guidesdugrandlarge.fr/images/import/file/30491191176.pdfIn PDF document text
    • https://myarchitect.es/ckfinder/userfiles/files/joxiboxeline.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/5f7d409d6db172b7de3c15a1da88cc03/godenofunosaxijoxox.pdfIn PDF document text
    • https://vipbeachhouse.com/uploads/editor/file/21332727380.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/0c57645d1cd662f1f5c9dc13c8a2d16f/befaveninuve.pdfIn 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_off0000e2f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F4 17052 bytes
SHA-256: d61a65d462fc6c0098648fdb374c1c59c0d316ece70a0679aca03cb08a5101e1
font_01_sfnt_off00010eb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EB7 11108 bytes
SHA-256: b9c411e9c8233dc13c0d352ee32f51e335a8bf61f66edb50bbdf02045d97fa3b
font_02_sfnt_off000128a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1