Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cc6db59d0202f55…

MALICIOUS

PDF

71.5 KB Created: 2021-09-13 15:24:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 494a470722d0335b87751345636b749f SHA-1: f7f3ececc34e9133e0b536663580740484f437d7 SHA-256: 7cc6db59d0202f555fa885d7f65c6e9521b9e7ae196e25a9a2e6642e4d635276
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the PDF structure and URL patterns are consistent with a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8295

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://ketchas.ru/uplcv?utm_term=live+wallpaper+miraculous+ladybug
    • http://wolfpackbasketballacademy.com/content_docs/86758127304.pdf
    • http://klick-tipp.info/ckfinder/userfiles/publics/files/pezebavakowawuvapebeken.pdf
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/161321c56381f7---tageberizow.pdf
    • http://nordicwalkingturak.hu/_user/file/fovivazumito.pdf
    • http://norrlandet.se/userfiles/file/72329059207.pdf
    • http://naszymsladem.pl/upload/file/56690737594.pdf
    • http://htwy.com/upload/file/81440627668.pdf
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/c06ad5bcc18e4354ffb86f3af5635489/88253442991.pdf
    • http://packagingandfoodmachinary.com/userfiles/file/46977390190.pdf
    • http://randoquad72.fr/userfiles/file/30442322769.pdf
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/842270d7aaa09ffc3d25209d0f3ba98b/vaxiwalotulafexusivu.pdf
    • http://mcserpenti.com/userfiles/file/41969052784.pdf
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/e5m358rt6546isbl423aii0hh3/kobadutubuzol.pdf
    • https://soechi.net/userfiles/file/bizapepedekafek.pdf
    • https://webmenuplus.com/images/file/rifukegap.pdf
    • https://taucaotoccatba.vn/images/news/files/52118191692.pdf
    • http://euroteam.vn/ckfinder/userfiles/files/62370685217.pdf
    • http://1carl.com/userfiles/file/68128032024.pdf
    • http://poptheme.cn/uploadfile/files/20210906_164243.pdf
    • https://cezartravel.hu/userfiles/file/kojudibefemidenir.pdf
    • http://palestraarkadia.it/userfiles/files/67634015290.pdf
    • https://jiu-hang.com/upfiles/editor/files/xanesoz.pdf
    • https://akamercedes.com/images/uploads/files/zelevipopuraxuduzelobube.pdf
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/392ff56aa86d5b5a0a55ba9d02108d87/37188329067.pdf
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf67.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCF67 16792 bytes
font_01_sfnt_off0000e77e.bin
4b939d1a61a0237a26b6990cdf921c688ef2039449038c64266651f858d38aa3
pdf-font-stream PDF embedded font (sfnt) at offset 0xE77E 11120 bytes