Malicious PDF — malware analysis report

Static analysis result for SHA-256 68f46a8a9348b865…

MALICIOUS

PDF

77.9 KB Created: 2021-09-09 08:32:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 9980d5d0c398af19abbd8cfaa002e045 SHA-1: 3c57fa9151b2ccf13edd65836874d9bf0c415fb3 SHA-256: 68f46a8a9348b86575ba17ad37c165be3b30fa47f96a9eac93fc78897b77d206
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery through these links. The 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristics confirm the nature of the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6877

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 http://khodahoanglang.com/admin/webroot/upload/image/files/ratuwasusafivoxuke.pdf In PDF document text
    • http://www.css-jp.com/upfile/files/2021/09/05/18943703487.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/9o59mkuqere2lmeh4mdbmcb7a2/23078396825.pdfIn PDF document text
    • https://kildevangen.dk/files/vuxibadime.pdfIn PDF document text
    • http://kavernoklub.com/campannas/file/puturonepunaxuromesu.pdfIn PDF document text
    • https://shevtsov-art.com/uploads/files/84312249965.pdfIn PDF document text
    • http://cristalensi.com/public/File/51711267773.pdfIn PDF document text
    • https://mimpiindahsatu.com/contents/files/fofitowojiwojevon.pdfIn PDF document text
    • http://hlqh.net/userfiles/file/20210904151132_1932303723.pdfIn PDF document text
    • http://twtipa.com/upfile/files/2021/09/01/24417615973.pdfIn PDF document text
    • http://rideabikenews.com/user_img/files/kuwatekikegipetiparedi.pdfIn PDF document text
    • https://computerzone.pk/file/wobetijojano.pdfIn PDF document text
    • https://srccaa.bdbabymart.com/app/webroot/ckfinder/userfiles/files/dawunoluxapobajifisazeda.pdfIn PDF document text
    • http://ltmetal.com/userfiles/files/fuziniwoxolibi.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16138aff752ecc---perepanelotakubemexosari.pdfIn PDF document text
    • https://sreekanakananda.com/ckfinder/userfiles/files/69141227889.pdfIn PDF document text
    • http://sfipl.in/userfiles/file/78971733508.pdfIn PDF document text
    • http://sportsclinicwest.ie/media/contents/file/zuzogelevufusun.pdfIn PDF document text
    • http://hotechike.com/files/files/23929613485.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161396e29a1373---84027394423.pdfIn PDF document text
    • https://nls.vn/upload/files/gavifoxejapukanu.pdfIn PDF document text
    • http://dlzj.net/upload/files/20210901104515257586.pdfIn PDF document text
    • https://coolingrealestate.com/your-home-cleaner/FCKuploads/file/93694991020.pdfIn PDF document text
    • https://olterus.net/contents/files/9902568763.pdfIn PDF document text
    • https://shivajigrihnirman.com/singhania/downloads/file/gijakepovaritisosazis.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=save+file+for+gta+san+andreas+androidPDF 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_off0000eeb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB9 10672 bytes
SHA-256: bd184752e96c6e6c365ed11c6cddc5642b1fa1194633b1cef49951bcbed155cf
font_01_sfnt_off00010712.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10712 19344 bytes
SHA-256: 7eee954f46edfa4cc049baa560bcc7d3de7f8a453d4b7ce552ad4bc5472bb475

Open this report in the interactive analyzer, or submit your own file for analysis.