Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fa1091ab4552b1a…

MALICIOUS

PDF

64.0 KB Created: 2021-07-22 07:35:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 152b1469c71dbef9114274198652a464 SHA-1: c33ea22b59421e77c5e735f9c683d2b09b8e1826 SHA-256: 7fa1091ab4552b1a4f5805fe6e1b2d17571b1ca5feafb9432a257428147d3df5
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to compromised WordPress upload directories, suggesting a tactic to host malicious content or redirect users to phishing sites. ClamAV detection as 'Pdf.Phishing.Trojan' and ML classification further support its malicious nature. The file's structure and link farm characteristics indicate it's designed to lure users to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7252

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/160896d5fca4b9---27512883503.pdf In PDF document text
    • http://bocghebinhduong.com/media/ftp/file/44712699346.pdfIn PDF document text
    • http://1qjd.com/upload/files/2021-07-10-03-02-44-EMkPtbQg.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160f8b51a51d3e---36265484903.pdfIn PDF document text
    • http://studio-rivetti.it/userfiles/files/87047829805.pdfIn PDF document text
    • http://fitnessklub-impuls.pl/uploads/assets/file/xibosojimobijax.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160774a19bfaa4---xizaminaxavi.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/vp3d7nj3bj2t6uel3uthnkiht3/baredu.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/16079e9b7bbbed---62213746852.pdfIn PDF document text
    • http://bobiniauto.com/userfiles/file/buvenim.pdfIn PDF document text
    • http://markone-tools.com/upload/files/gezejuxafazamek.pdfIn PDF document text
    • https://parquesanalbertohurtado.cl/ckfinder/userfiles/files/matemedosepuki.pdfIn PDF document text
    • https://digireg.com/upload/folumojim.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8bcf7d4da---duponinikonujijif.pdfIn PDF document text
    • http://perlawarmii.pl/userfiles/file/44798881193.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/194a81cd0a0a8b644da83dd9bc4efe7a/dulokoditozerepiwu.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/8a99ad002641d80cd261bf4d6f7aa6c4/nolafemiwopopitijub.pdfIn PDF document text
    • https://yepsell.com/userfiles/files/vosux.pdfIn PDF document text
    • http://kiiga.ru/userfiles/file/97322837929.pdfIn PDF document text
    • http://ckrestaurantgroup.com/ckfinder/userfiles/files/4949961457.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/pl3666tu7f43j6i3f291urir1j/95366936364.pdfIn PDF document text
    • https://tidymoney.com/ckfinder/userfiles/files/pegolezupenusutaxu.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/3738efbd613d0ea41f036d50d9ccb298/wafumazavalusurevonid.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=most+known+anime+songsPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC71 10476 bytes
SHA-256: fdb601ecee5c57491c4db024b93765d14d950c4967543a0df7ad174826464611

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